52nd week of 2009 patent applcation highlights part 31 |
Patent application number | Title | Published |
20090316741 | Temperature control apparatus and optical transmission device using same - A temperature control apparatus that performs stabile temperature control operation, besides avoiding generation of unwanted noise. A thermo-control device cools or heats an object according to a supply current that a thermo-control driver provides according to a specified control voltage. A temperature sensor observes the temperature of the object. A variable voltage controller varies the control voltage such that the observed temperature of the object will be a specified reference temperature. The variable voltage controller begins to operate in alternate setting mode when the control voltage is expected to enter a voltage range in which the thermo-control driver could malfunction. During that mode, the variable voltage controller outputs a first control voltage and a second control voltage alternately at predetermined intervals. The first and second control voltages are malfunction-free voltages near the malfunction-prone voltage range. | 2009-12-24 |
20090316742 | SEMICONDUCTOR LASER DEVICE AND DRIVING METHOD OF THE SAME - A semiconductor laser device according to the present invention outputs light while periodically varying the temperature of a semiconductor laser, an optical waveguide, or a diffraction grating, outputs light while causing the optical waveguide or the diffraction grating to mechanically and periodically vary, or causes return light, which varies periodically or non-periodically, to be incident on the semiconductor laser. Since the periodical fluctuation is applied to the temperature of the semiconductor laser, the optical waveguide, or diffraction grating, the periodical mechanical variation is applied to the optical waveguide or the diffraction grating, or the return light is caused to be incident on the semiconductor laser, the semiconductor laser carries out a multimode oscillation from a low output to a high output without shifting between a single mode oscillation and a multimode oscillation. Accordingly, the present invention can provide a semiconductor laser device having IL characteristics in which a current is proportional to a light output and a driving method thereof. | 2009-12-24 |
20090316743 | LASER DIODE DRIVER WITH ADAPTIVE COMPLIANCE VOLTAGE - A laser diode driver with means for adjusting the compliance voltage to allow a current source to accurately reproduce a current command while simultaneously minimizing the power dissipation of the current source. For a slowly-varying or DC current command, the compliance voltage is continuously adjusted to limit the power dissipation of the current source to below a predetermined minimum. For a pulsed current waveform, the compliance voltage is maximized during periods of zero or low current demand so that sufficient energy is stored to faithfully reproduce the leading edge of a pulsed current command, and reduced during the plateau portion of a pulsed current command to minimize the power dissipation of the current source. | 2009-12-24 |
20090316744 | SEMICONDUCTOR LASER, METHOD FOR MANUFACTURING SEMICONDUCTOR LASER, OPTICAL DISK DEVICE, AND OPTICAL PICKUP - A semiconductor laser including: a nitride III-V compound semiconductor substrate configured to have a first planar area, a second planar area, and a third planar area in a major surface, the first planar area being formed of a C-plane, the second planar area being continuous with the first planar area and being formed of a semipolar plane inclined to the first planar area, the third planar area being continuous with the second planar area and being formed of a C-plane parallel to the first planar area; a first cladding layer configured to be composed of a nitride III-V compound semiconductor on the major surface of the nitride III-V compound semiconductor substrate; an active layer configured to be composed of a nitride III-V compound semiconductor that exists on the first cladding layer and contains In; and a second cladding layer configured to be composed of a nitride III-V compound semiconductor on the active layer. | 2009-12-24 |
20090316745 | OPTICAL MODULE - A laser diode has a horizontal cavity and a mirror attached to the horizontal cavity at an angle of substantially 45° or substantially 135°. The laser diode is mounted on a stem substantially horizontally with taking light vertically emitted to the horizontal cavity as an optical signal, and light horizontally emitted as an optical signal for monitoring, respectively. A photodetector is mounted on the stem substantially orthogonally and so as to let in the optical signal for monitoring. | 2009-12-24 |
20090316746 | SLAB TYPE LASER APPARATUS - A slab type laser apparatus has a slab type gas laser medium part formed in a region defined by a pair of electrode flat plates oppositely disposed in parallel with each other in a space to be filled with a gas laser medium which is excited by high-frequency electric power. The apparatus includes an oscillator part including a pair of resonator mirrors oppositely disposed with a part of the gas laser medium part in between, and for amplifying a laser beam to have predetermined light intensity to emit the laser beam, and the amplifier part including a plurality of return mirrors oppositely disposed with a part of the gas laser medium part in between. The incident laser beam goes and returns plural times between the return mirrors, and the laser beam is amplified to have predetermined power. | 2009-12-24 |
20090316747 | ENERGETIC MATERIAL DETECTOR - A method of detecting energetic materials, such as explosives, includes energizing a sample area that contains particles of energetic materials. In the method, temperature characteristics from the sample area are monitored, and a temperature released from exothermic decomposition of the particles is detected. The method further includes analyzing the detected temperature to determine the presence of the exothermic compound which caused the decomposition. | 2009-12-24 |
20090316748 | SYSTEMS AND METHODS FOR PRODUCING THERMAL MECHANICAL FATIGUE ON GAS TURBINE ROTORS IN A SPIN TEST ENVIRONMENT - A test facility includes a heat source to thermally load a test object being mechanically loaded by rotation imposed by a spin test rig. The heat source can be a quartz lamp controlled to provide a thermal load with a differing phase than the mechanical load. Testing cycles can be run for the test object, with impingement cooling permitting the removal of the thermal load between cycles. The test facility emulates operating conditions in a gas turbine engine to impose realistic thermal and mechanical fatigue stress on the test component. | 2009-12-24 |
20090316749 | SUBSTRATE TEMPERATURE MEASUREMENT BY INFRARED TRANSMISSION IN AN ETCH PROCESS - A method and apparatus for measuring a temperature during a process are provided. In one embodiment, an apparatus for measuring a substrate temperature during an etching process is provided that includes a chamber body, a chamber lid enclosing the chamber body and a substrate support assembly. A plurality of windows formed in a substrate supporting surface of the substrate support assembly. A signal generator is optically coupled through the substrate support assembly to the windows. A sensor is positioned above the substrate support and aligned to receive energy transmitted from the signal generator through at least one of the windows, wherein the sensor is configured to detect a metric indicative of transmittance. | 2009-12-24 |
20090316750 | SYSTEM AND METHOD FOR REDUCING TEMPERATURE VARIATION DURING BURN IN - Systems and methods for reducing temperature variation during burn-in testing. In one embodiment, power consumed by an integrated circuit under test is measured. An ambient temperature associated with the integrated circuit is measured. A desired junction temperature of the integrated circuit is achieved by adjusting a body bias voltage of the integrated circuit. By controlling temperature of individual integrated circuits, temperature variation during burn-in testing can be reduced. | 2009-12-24 |
20090316751 | Sensor Arrangement for Temperature Measurement - In a sensor arrangement ( | 2009-12-24 |
20090316752 | TEMPERATURE SENSOR WITH LEADS - A thermistor includes a thermistor body and terminal electrodes disposed at both ends of the thermistor body. A first lead is longer than a second lead. The first and second leads include tips having inclined shapes that are cut such that metal lines are surface-exposed, respectively. The thermistor body is attached at a predetermined side position of the first lead such that the first lead and a side folding portion of the terminal electrode form a predetermined angle θ. The terminal electrode and the first lead are connected to each other through solder, and the second lead and the terminal electrode are connected to each other through solder. This can prevent the occurrence of damage even if an excessive thermal stress is applied. The temperature sensor with leads having stable electric connection with the temperature sensor that has satisfactory detection sensitivity and high reliability is achieved. | 2009-12-24 |
20090316753 | TEMPERATURE SYSTEM WITH MAGNETIC FIELD SUPPRESSION - A temperature system is provided with magnetic field suppression. In one embodiment, the temperature system comprises a plurality of conductors patterned to conduct current in directions that generate 2 | 2009-12-24 |
20090316754 | METHOD FOR DECODING DIGITAL DATA IN A FREQUENCY HOPPING COMMUNICATION SYSTEM - An improved method is provided for decoding data in a frequency hopping communications system. The method includes: monitoring transition points between data bits in a demodulated data stream, where the data bits are transmitted to a receiver over different transmission frequencies; determining a frequency over which data bits are transmitted to the receiver; determining a reliability metric for each frequency over which data bits were received, where the reliability metric is based on transition points of data bits transmitted over a given frequency; and performing a decoding operation using the reliability metric for each frequency over which data bits were received. | 2009-12-24 |
20090316755 | Virtual or Remote Transponder - A system and method for transmitting UAV position data to a central flight control center transmits UAV position data using a virtual transponder. A ground control station for controlling the UAV receives data from the UAV, including UAV position data. The UAV may provide GPS data, or corrected position data based on readings from an inertial navigation system. The ground control station transmits the UAV position data to a flight control center. | 2009-12-24 |
20090316756 | APPARATUS AND METHOD FOR TRANSMISSION OF SOUNDING REFERENCE SIGNAL IN UPLINK WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS AND SOUNDING REFERENCE SIGNAL HOPPING - A sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal using the multiple antenna technique is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. Moreover, the sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. The sounding reference signal is transmitted through an antenna pattern in which the sounding reference signal can be transmitted through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead in this environment. | 2009-12-24 |
20090316757 | SYSTEM AND METHOD USING HIGH PERFORMANCE PREAMBLE COVER SEQUENCES FOR MULTI-BAND OFDM TWO-BAND HOPPING MODES - Methods and systems for packet preamble sequences are provided. The preamble sequences are produce by multiplying preestablished base sequences by cover sequences. The cover sequences are chosen for high-performance in multi-band OFDM systems with modes that include two-band hopping. | 2009-12-24 |
20090316758 | METHOD FOR TRANSMITTING DATA USING FREQUENCY HOPPING SCHEME AND METHOD FOR DETERMINING A SUB-BAND FOR THE FREQUENCY HOPPING - A frequency hopping scheme in a communication system using a plurality of sub-carriers is disclosed. A sub-band for frequency hopping is set and the frequency hopping scheme is applied using the set sub-band. The frequency hopping scheme is applied in the communication system by assigning a virtual index to a resource block including one or more sub-carriers and transforming the virtual index according to a specific rule to acquire a virtual index of a next resource block for the frequency hopping. | 2009-12-24 |
20090316759 | MULTI-USER DETECTION USING EQUALIZATION AND SUCCESSIVE INTERFERENCE CANCELLATION - A method and apparatus for multi-user detection using equalization and successive interference cancellation is provided. A signal is received in a shared spectrum. Samples of the received signal are produced as a received vector. The received vector is segmented into a plurality of vector segments. For each segment, symbols for a plurality of communications are successively determined by determining symbols for a communication and removing a contribution of that communication from the vector segment. The determined symbols are assembled into a data vector for each communication. | 2009-12-24 |
20090316760 | UWB APPARATUS AND METHOD - An ultra-wideband receiver for processing a received signal comprising two or more diversity signals formed using a spreading technique at a transmitter comprises channel estimation means for estimating the channel over which the signal was transmitted. The receiver comprises inverting means for inverting the channel estimate obtained from the channel estimation means, the inverse of the estimated channel being applied to the received signal to generate a compensated signal. The receiver comprises means fur weighting the compensated signal prior to demodulation using an estimate of noise in each channel, the estimate of the noise in each channel being derived from the inverse of the channel estimation process. | 2009-12-24 |
20090316761 | Method and Apparatus For Transmitting and Receiving High Speed Data Using Code Division Multiple Access Channels - The present invention describes a spread spectrum communication system wherein the frequency of carriers and the code channels of the carriers or both for transmission to a given remote station user vary in time. This provides for a direct sequence spectrum communications system which changes frequency or code channel according to a predetermined pattern. The code channels and frequencies can be determined in accordance with a deterministic function or based upon a subset of the data to be transmitted. A receiver structure is also described for receiving the same. | 2009-12-24 |
20090316762 | SCALING USING GAIN FACTORS FOR USE IN DATA DETECTION - Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal. | 2009-12-24 |
20090316763 | SPATIAL MULTIPLEXING GAIN FOR A DISTRIBUTED COOPERATIVE COMMUNICATIONS SYSTEM USING RANDOMIZED CODING - Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously transmitted in parallel to the destination receiver. Thus a higher spatial multiplexing gain can be obtained. Such exemplary embodiments might do so by allowing each relay to transmit a linear combination of antenna waveforms according to an independently and randomly generated coefficient vector. This randomized cooperation scheme may be useful in an environment in which a group of relay devices are close to the source device, and can therefore receive information at a high rate. Each relay device that receives the information without errors splits it into multiple streams. For example, if the relay devices receive B symbols and the number of streams is K, each stream contains B/K symbols. Each relay device then generates a random linear combination of all the streams and transmits this output simultaneously with the other relay devices. | 2009-12-24 |
20090316764 | Communication circuit for a bi-directional data transmission - A communication circuit for providing a bi-directional data transmission over a signal line, thereby receiving a first digital data stream and transmitting a corresponding first signal into a near end of a signal line to a remote device, the remote device being connected to a far end of the signal line, receiving a second signal at the near end of the signal line from the remote device and deriving a second digital data stream therefrom, having a replica generator for providing, in response to the first digital data stream or a signal derived therefrom, a replica signal, and an extraction circuit for extracting the second digital data stream from the second signal in response to the replica signal and a comparator signal deduced from the near end of the signal line and an automatic test equipment having a plurality of communication circuits each providing a bi-directional data transmission. | 2009-12-24 |
20090316765 | METHOD AND APPARATUS FOR REDUCING THE PROCESSING RATE OF A CHIP-LEVEL EQUALIZATION RECEIVER - A method and apparatus for reducing the processing rate when performing chip-level equalization (CLE) in a code division multiple access (CDMA) receiver which includes an equalizer filter. Signals received by at least one antenna of the receiver are sampled at M times the chip rate. Each sample stream is split into M sample data streams at the chip rate. Multipath combining is preferably performed on each split sample data stream. The sample data streams are then combined into one combined sample data stream at the chip rate. The equalizer filter performs equalization on the combined sample stream at the chip rate. Filter coefficients are adjusted by adding a correction term to the filter coefficients utilized by the equalizer filter for a previous iteration. | 2009-12-24 |
20090316766 | METHOD OF DETERMINING A CHANNEL QUALITY AND MODEM - Data transmission is disclosed over a transmission channel that is subject to narrowband interferers. An increased overall bit or data transmission rate is achieved by an exemplary method of determining a channel capacity of plural sub-channels of the transmission channel based on a net background noise power estimation. The net background noise power contains only white noise-like contributions and excludes, to a reasonable extent, noise contributions or signal power from narrowband interferers. Hence, the net background noise power can be reduced. For example, an Orthogonal Frequency Division Multiplex (OFDM) signal code construction or bit allocation scheme can be chosen that provides for optimized data transmission at a data rate that approximates or approaches the more realistic channel capacity of an individual sub-channel, resulting in an increased overall bit or data transmission rate. | 2009-12-24 |
20090316767 | Detecting Residual ISI Components Using Two Data Patterns - In one embodiment, a method includes accessing an input signal from a receiver that includes a series of bits and further comprising residual boundary intersymbol interference (ISI). The method includes identifying a first bit sequence in the input signal and identifying a second bit sequence in the input signal that differs from the first bit sequence with respect to one or more data values of one or more bits in the first and second bit sequences corresponding to particular residual boundary ISI for measurement. The method includes determining a difference between first boundary error in the first bit sequence and second boundary error in the second bit sequence and measuring the particular residual boundary ISI by the difference for use in adaptive equalizer control. | 2009-12-24 |
20090316768 | METHOD AND APPARATUS FOR GENERATING EQUALIZER FILTER TAP COEFFICIENTS - A method and apparatus generating an error signal and an update vector signal used to generate filter tap coefficients for an equalizer filter residing in an equalizer. The equalizer filter outputs an equalized signal in response to receiving a sample data stream. The error signal is generated by down-sampling the equalized signal, subtracting the equalized signal from a reference signal, and filtering and down-sampling the resulting signal. Simultaneously, the update vector signal is generated by converting scalar samples of the sample data stream to a data vector signal and descrambling, filtering, and down-sampling the data vector signal. A tap coefficients generator is used to generate the filter tap coefficients for updating the equalizer filter based on the error signal and the update vector signal. | 2009-12-24 |
20090316769 | DECISION FEEDBACK EQUALIZER (DFE) - In one embodiment, a method includes receiving an input signal from a receiver, receiving a data clock (DCLK) signal, and receiving a boundary clock (BCLK) signal. The method includes, based on the input signal and the DCLK signal, recovering data from the input signal to produce a first output signal. The method includes, based on the input signal and the BCLK signal, recovering boundaries between bits in the input signal to produce a second output signal. The method includes, based on the first and second output signals, producing the DCLK and BCLK signals, with the DCLK signal being delayed with respect to the BCLK signal less than approximately 0.5 unit intervals (UIs) and greater than or equal to approximately zero UIs. | 2009-12-24 |
20090316770 | ADAPTIVE CONTROL OF A DECISION FEEDBACK EQUALIZER (DFE) - In one embodiment, a system includes one or more DFEs, each of which includes a feedback (FB) loop to compensate for distortion in an output signal that includes information recovered by a decision circuit from an input signal from a receiver. A first FB tap of a data DFE delays a first output signal of a first decision circuit by approximately 1.0 UIs and multiplies the 1.0-UI-delayed first output signal by a first data FB coefficient derived from a first boundary FB coefficient. A first FB tap of a boundary DFE delays the first output signal by approximately 1.5 UIs and multiplies the 1.5-UI-delayed first output signal by the first boundary FB coefficient, which corresponds to ISI at approximately 1.5 UIs of delay in the input signal. | 2009-12-24 |
20090316771 | Sign-Based General Zero-Forcing Adaptive Equalizer Control - In one embodiment, a system includes one or more digital feedback equalizers (DFEs) that include one or more residual intersymbol interference (ISI) detectors, one or more column balancers, and one or more weight selectors. The residual ISI detectors produce a first output signal indicating whether the residual ISI of a received input signal has a positive sign or a negative sign. The column balancers select one of the first output signals to produce a second output signal. The weight selectors access one of the weight values. The weight value corresponds to the column balancer that produced the second output signal and the residual ISI detector that produced the first output signal, and has a magnitude that is substantially independent of the sign of the residual ISI. The weight selectors produce a third output signal based on the weight value and the sign of the residual ISI. | 2009-12-24 |
20090316772 | Multidimensional Asymmetric Bang-Bang Control - In one embodiment, a system includes one or more digital feedback equalizers (DFEs) that include one or more residual intersymbol interference (ISI) detectors, one or more column balancers, and one or more weight selectors. The residual ISI detectors produce a first output signal indicating whether the residual ISI of a received input signal has a positive sign or a negative sign. The column balancers select one of the first output signals to produce a second output signal. The weight selectors access one of the weight values. The weight value corresponds to the column balancer, the residual ISI detector that, and the sign of the residual ISI, and has a magnitude that is substantially independent of the sign of the residual ISI. The weight selectors produce a third output signal based on the weight value and the sign of the residual ISI. | 2009-12-24 |
20090316773 | WORD SYNCHRONIZATION FOR SERVO READ SIGNALS IN TAPE DRIVES - Methods and apparatus for detecting L-bit sync words occurring at N-bit intervals in PPM-encoded servo pattern read signals read in magnetic tape drives. A soft output detector processes the PPM-encoded servo pattern read signal to produce a series of soft output samples corresponding to respective bits encoded in the servo pattern. A sync word detector then produces block correlation values for respective positions of a sliding L-sample block in the series of soft output samples by (i) calculating at each block position bit correlation values indicating correlation between respective samples and corresponding bits of the sync word and (ii) summing each bit correlation value minus a predetermined function of the corresponding sample value. The sync word detector then detects a sync word at the block position with the maximum block correlation value in an (N+L−1)-sample sequence of the series of soft output samples. | 2009-12-24 |
20090316774 | METHOD AND APPARATUS FOR MULTI-PART INTERACTIVE COMPRESSION - In order to increase the compression of data being transmitted between two devices in communication, the data may be broken up into individual components and individually compressed using different compression state information. The method of multi-part interactive compression comprises the steps of retrieving a request for data from a communicating party; retrieving the data; parsing the data into components according to the content of the data; and compressing each of the components using compression state information. | 2009-12-24 |
20090316775 | VIDEO ENCODING AND DECODING METHOD AND SYSTEM THEREOF - A video encoding system for encoding at least one frame, which includes a plurality of data units, to a bit stream. The system includes: a scaling unit, for scaling a data unit of a current frame to generate a scaled data unit in a first mode; and a video encoder, coupled to the scaling unit, for directly retrieving the scaled data unit from the scaling unit and encoding the scaled data unit to generate a coded data unit in the first mode. | 2009-12-24 |
20090316776 | Method for providing channel service - A method for providing a channel service is disclosed. In accordance with the present invention, a fixed information including a BUMF information, an SF information and a playlist information and a variable information including a clip information associated with a streaming data of a selected channel service are transmitted to a playback apparatus supporting a BD-J specification, thereby enabling a Blu-ray player incapable of playing the streaming data to provide viewers with the streaming data of the channel service. | 2009-12-24 |
20090316777 | Method and Apparatus for Improved Broadcast Bandwidth Efficiency During Transmission of a Static Code Page of an Advertisement - Advertisements are transferred to mobile handheld displays (MHDs) during slack time, when the spectrum is not busy for download at, and storage on, the MHDs. The stored advertisements are then selectively rendered during available ad spots when the user is viewing content on the MHD. A main code page that comprises all of the pixels that are static within the ad is initially transmitted to the MHD. This transmission is then followed by the transmission of additional packets that include information that only concerns the pixels in the main code page that change from frame to frame, along with information regarding the location of such changes within the code page. There are typically only a small number of changes between frames in an ad, such that only a small amount of information need be transmitted to represent these changes, when compared to the amount of information contained in each frame of the ad. Thus, the bandwidth requirement for transmission of these changes is much less than that of the actual frames. | 2009-12-24 |
20090316778 | Method And System For Optimal Video Transcoding Based On Utility Function Descriptors - Techniques for generating utility-based descriptors from compressed multimedia information are disclosed. A preferred method includes the steps of receiving least a segment of compressed multimedia information, determining two or more portions of utility based descriptor information based on one or more adaptation operations, each corresponding to a unique target rate, adapting the compressed multimedia segment by each the portions of utility based descriptor information to generate adapted multimedia segments, using a quality management method to generate measurement for each adapted multimedia segment, and generating a utility based descriptors based on the portions of utility based descriptor information and corresponding quality measurements. | 2009-12-24 |
20090316779 | INFORMATION PROCESSING DEVICE AND METHOD - The present invention relates to an information processing apparatus and method which make it possible to transmit image data with high quality and low delay in more versatile situations. A control unit | 2009-12-24 |
20090316780 | Video coding method with non-compressed mode and device implementing the method - The present invention relates to a method of video coding comprising a mechanism enabling activation or deactivation of the compression of macroblocks of the video stream to be coded according to the efficiency of the compression and functioning in at least two modes, a first normal coding mode and a second non-compressed coding mode, said method being wherein it comprises normal coding mode, the macroblock being processed is compressed by a coding loop then by an entropic coder, said compression being considered efficient if the size occupied by the compressed macroblock is noticeably less than the size occupied by the macroblock without compression, in the case where the compression of the macroblock being processed is not efficient, the non-compressed mode is activated ( | 2009-12-24 |
20090316781 | PICTURE CODING METHOD - A picture coding method according to the present invention includes: a coding step (S | 2009-12-24 |
20090316782 | IMAGE DECODING APPARATUS - An access unit to be decoded is selected from data stored in a coded picture buffer (CPB) ( | 2009-12-24 |
20090316783 | BIDIRECTIONALLY DECODABLE WYNER-ZIV VIDEO CODING - Systems and methodologies for employing bidirectionally decodable Wyner-Ziv video coding (BDWZVC) are described herein. BDWZVC can be used to generate M-frames, which have multiple reference frames at an encoder and can be forward and backward decodable. For example, optimal Lagrangian multipliers for forward and backward motion estimation can be derived and/or utilized. The optimal Lagrangian multiplier for backward motion estimation can be approximately twice as large as the optimal Lagrangian multiplier for forward motion estimation. Further, an optimal P-frame/M-frame selection scheme can be employed to enhance rate-distortion performance when video is transmitted over an error prone channel. Accordingly, a first frame in a group of pictures (GOP) can be encoded as an I-frame, a next m−1 frames can be encoded as P-frames, and a remaining n-m frames can be encoded as M-frames, where n can be a length of the GOP and m can be optimally identified. | 2009-12-24 |
20090316784 | Device for generating an interpolated frame - The present invention is situated within the frame or video processing domain and more particularly in the domain of video interpolation. It relates to a device for generating an interpolated frame from source frames temporarily surrounding it. This device comprises motion estimation means, motion compensated interpolation means, linear interpolation means, means for mixing the frame produced by the motion compensated interpolation means with the frame produced by the linear interpolation means. According to the invention, the mixing coefficients assigned to these two frames depend on the displaced frame difference and/or the frame difference between the source frames surrounding this interpolated frame and/or estimated motion vectors. | 2009-12-24 |
20090316785 | JOINT SYSTEM FOR FRAME RATE CONVERSION AND VIDEO COMPRESSION - A video processing apparatus includes a storage interface, where information and hardware of a motion estimation module and a motion compensation module are shared between frame rate conversion and video coding operations. The video processing apparatus therefore may perform both the frame rate conversion and video coding operations at the same time or perform them by turns, while requiring fewer resources and a smaller chip area than conventional methods. | 2009-12-24 |
20090316786 | MOTION ESTIMATION AT IMAGE BORDERS - An estimated motion vector within image signals to obtain robust motion vectors is provided by creating at least one candidate motion vector for at least one current block within an image of the signal, determining for each of said candidate motion vectors at least one match block within at least one image which is temporally neighboring the image of the current block, detecting if the at least one match block lies at least partially outside the active area of the image, then candidate motion vector is calculated based on at least the shifted current block and the shifted match block and shifting at least the current block and the match block such that the match block lies within the active area of the image. | 2009-12-24 |
20090316787 | MOVING IMAGE ENCODER AND DECODER, AND MOVING IMAGE ENCODING METHOD AND DECODING METHOD - A high-compression-ratio encoding and decoding technique is provided which enables random access image reproduction and which can prevent temporary decoding failure. A moving image encoder includes a substitute image generation section which generates a substitute image for a target area to be processed of an input image and a substitute image selection section which outputs information on the substitute image according to a reference image used at a prediction section. When the reference image used at the prediction section is an already encoded image, the substitute image selection section outputs the information on the substitute image to a variable-length encoding section. The variable-length encoding section encodes difference image data from a transform/quantization section into a variable-length code and generates an encoded stream by including the information on the substitute image in the variable-length code. | 2009-12-24 |
20090316788 | Video coding method with non-compressed mode and device implementing the method - The present invention relates to a video coding method comprising a mechanism enabling the activation or deactivation of the compression of video stream macroblocks to be coded according to the efficiency of compression and operating in at least two modes, the first coding mode being normal and the second mode being non-compressed, wherein said method comprises: in normal coding mode, the macroblock being processed is compressed by a coding loop then by an entropic coder, said compression being considered efficient if the size occupied by the macroblock after compression is notably less than the size that the macroblock occupies without compression, in the case where the compression of the macroblock being processed is not efficient, the non-compressed mode is activated, said non-compressed mode being characterized by the fact that the samples corresponding to the macroblock being processed reconstructed by the local decoder of the coding loop are transmitted without compression at the output of the coder. | 2009-12-24 |
20090316789 | DEVICE, METHOD AND PROGRAM FOR GENERATING INTERPOLATION FRAME - An interpolation frame generation device that generates an interpolation frame that interpolates image frames that are obtained by decoding a coded image signal that is coded by motion compensation, includes a motion vector deriving unit and an interpolation frame generating unit. The motion vector deriving unit acquires a motion compensation vector of a coded block that forms the coded image signal. The interpolation frame generating unit generates the interpolation frame in accordance with the motion vector of the image block that forms an image frame by using the motion compensation vector of the coded block as the motion vector of the image block. | 2009-12-24 |
20090316790 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 2009-12-24 |
20090316791 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 2009-12-24 |
20090316792 | DECODING METHOD, PROGRAM FOR DECODING METHOD, RECORDING MEDIUM WITH RECORDED PROGRAM FOR DECODING METHOD, AND DECODING DEVICE - The present invention is applied to a decoder based on the ITU-T H.264 method, for example, and detects continuous numbers of a syntax element of a specific value, such as a value 0, and decodes the syntax element on the basis of the detection result. | 2009-12-24 |
20090316793 | METHOD AND SYSTEM FOR ADAPTIVE DEBLOCKING FOR AVS1-P2 - Aspects of a method and system for adaptive deblocking for AVS1-P2 are provided. An AVS decoder may receive a bitstream comprising filtering parameters and plural macroblocks. The plural macroblocks may be decoded to form decoded pictures to be processed based on the filtering parameters and corresponding adjusted quantization parameters (adj_qp) calculated from the perspective decoded pictures. The adj_qp of a decoded picture may be determined based on the type of the decoded picture and associated reference pictures of the decoded picture. A filtering strength may be determined and/or adjusted based on the filtering parameters, the slice boundary information, the adj_qp, and user control information. The decoded picture may be filtered via an outer-loop deblocking filter with the determined filtering strength to reduce macroblock and/or slice boundary artifacts of the decoded picture. The outer-loop deblocking filter may be turned on or off in responsive to the determined filter strength level. | 2009-12-24 |
20090316794 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus for processing image data by partitioning an image contained in the image data into a plurality of macro blocks, the apparatus includes: a determination module configured to detect an edge pixel for each of the macro blocks and determine a direction of an edge with respect to the detected edge pixel for each of the macro blocks; a smoothing module configured to perform smoothing process for each of pixels except the edge pixel to remove ringing noise; and a sharpening module configured to sharpen the image by performing interpolating process for interpolating the pixels based on the determined direction of the edge. | 2009-12-24 |
20090316795 | Displaying Video at Multiple Resolution Levels - A method of displaying video includes receiving a video bitstream corresponding to a video. The video comprises a sequence of frames having an associated video resolution level. At least a portion of the video bitstream is decoded. A background region of the video is displayed at a first video resolution level and a window region of the video is displayed at a second video resolution level. The second video resolution level is higher than the first video resolution level. | 2009-12-24 |
20090316796 | Digital Television Decoder - A method of operating a digital television decoder is disclosed. The decoder includes a memory, the memory storing onboard software, and the decoder is operable in a run mode to execute the onboard software. The method comprises: activating a power saving mode on the decoder; and upon activating the power saving mode: maintaining power to the memory; suspending execution of the onboard software; acquiring an execution context of the onboard software; updating the execution context of the onboard software to form an updated execution context; and saving the updated execution context in the memory. | 2009-12-24 |
20090316797 | DISTRIBUTED CODED VIDEO DECODING APPARATUS AND METHOD CAPABLE OF SUCCESSIVELY IMPROVING SIDE INFORMATION ON THE BASIS OF RELIABILITY OF RECONSTRUCTED DATA - Disclosed herein is a distributed coded video decoding apparatus. The distributed coded video decoding apparatus includes a key picture decoding unit for reconstructing a key picture, a side information generation unit for generating side information using the key picture and/or previously reconstructed WZ pictures, a side information update unit for updating the side information using the side information and corrected reconstructed video, a channel code decoding unit for decoding quantization symbols, a video reconstruction unit for reconstructing a current WZ picture using the quantization symbols and the side information, and a video correction unit for calculating the reconstructed data reliability using channel code decoded data reliability of the decoded data and/or the reconstructed video reliability determining whether to correct the reconstructed video and determining a correction unit based on the calculated the reconstructed data reliability and then correcting the reconstructed video. | 2009-12-24 |
20090316798 | AUDIO AND VIDEO PROCESSING APPARATUS - The present invention performs video and audio compression/decompression, video input and output scaling, video input and output processing for enhancement, and system layer functions on a single semiconductor chip. The media processor is compromised of video processor with a SIMD vector engine, audio processor, stream processor, system processor, and video scalers, LUTs and hardware blender. Unified memory architecture is used where these four processors use a shared memory for data and instructions. Data transfers between multiple processors use multiple packet-based unidirectional communication channels via hardware-assisted circular queues in unified memory. The video processor is a SIMD processor coupled to a regular RISC processor as a dual-issue processor. Such integrated and programmable functionality provides implementation of multiple video and audio for compression standards and programmable video enhancement. Important applications of this include Digital TV, IP Video Phone, and Digital Camcorder/Camera. | 2009-12-24 |
20090316799 | Image Processing Circuit and Associated Method - An image processing circuit includes a compression circuit, a plurality of first line buffers, a decompression circuit, and a motion estimation/compensation circuit. The compression circuit receives source image data and compresses the received source image data to generate a compressed image data. The first line buffers, coupled to the compression circuit, sequentially receive the compressed image data and buffer the compressed image data. The decompression circuit, coupled to the first line buffers, decompresses the compressed image data to generate a decompressed image data. The motion estimation/compression circuit, coupled to the decompression circuit, performs motion estimation/compensation according to the decompressed image data. | 2009-12-24 |
20090316800 | Low speed access to dram - Embodiments provide access to a memory over a high speed serial link at slower speeds than the high speed serial links regular operation. An embodiment may comprise a memory apparatus with a differential receiver coupled to a protocol recognition circuit, a low speed receiving circuit that has a first receiver coupled with a first input of the differential receiver and a second receiver coupled with a second input of the differential receiver, wherein the low speed receiving circuit is coupled with the protocol recognition circuit, allowing the first and second receivers to access the protocol recognition block at a different frequency than the differential receiver. | 2009-12-24 |
20090316801 | Radio Device, Electronic Device, and Imaging Device - A radio device for transmitting or receiving desired information through an MIMO transmission line, and an electronic device and an imaging device which have the radio device and supplied with drive power together with the radio device may realize to implement a desired radio transmission flexibly in the form suitable for the battery residual amount and power consumption, in which plural antenna sections for performing radio communication by a spatial division multiplexing method on an MIMO transmission line, and a controller for increasing or decreasing the number of the antenna portions used for the radio transmission. | 2009-12-24 |
20090316802 | MULTI-USER MIMO SYSTEMS AND METHODS - A method is provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system. The MIMO-OFDM system may comprise at least one MIMO-OFDM transmitter and at least one MIMO-OFDM receiver Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO-OFDM communication systems. The method may comprise generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI. | 2009-12-24 |
20090316803 | MIMO RECEIVER - In a MIMO receiver, initial solutions using sub-optional decoding algorithm are determined for the symbols transmitted from each of a number of transmit antennas at a given time ( | 2009-12-24 |
20090316804 | METHOD AND APPARATUS TO IMPLEMENT OFDMA RANGING IN WIMAX SYSTEM - A communications processing device includes a rotor for rotating information associated with ranging subchannels in some symbols; and a single inverse fast Fourier transformer (IFFT), coupled to rotor, for subjecting the rotated information to a single IFFT along with information from all other channels. A method comprising the steps of: rotating information associated with ranging subchannels in some symbols; and subjecting the rotated information to a single IFFT along with information from all other channels. | 2009-12-24 |
20090316805 | ENERGY-EFFICIENT LINK ADAPTATION AND RESOURCE ALLOCATION FOR WIRELESS OFDMA SYSTEMS - An energy-efficient framework for active transmission in OFDMA-based long-range wireless networks is disclosed. This frame-work is based on using energy-aware metrics for resource allocation and link adaptation. By casting the optimal energy-efficient resource allocation problem as utility-based optimization problem, low-complexity utility-based resource allocation schemes developed here can be applied to reduce the complexity of resource allocation decisions. | 2009-12-24 |
20090316806 | METHODS AND SYSTEMS FOR UTILIZING A MULTICAST/BROADCAST CID SCHEDULING MAC MANAGEMENT MESSAGE - Methods and systems for utilizing a multicast/broadcast connection identifier (CID) scheduling message in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frame in an effort to bypass at least a portion of the Media Access Control (MAC) protocol data unit (PDU) parsing of the frame are provided. By bypassing at least a portion of the MAC PDU parsing of the OFDM/OFDMA frame (which may be in accordance with one or more standards of the IEEE 802.16 family of standards), a particular user terminal need not spend a lot of overhead in the CID filtering process, determining which MAC PDUs are intended to be processed by the MAC of that particular user terminal. Furthermore, for certain embodiments, a user terminal may power down related circuitry during the terminal's bypassing time period(s) of the OFDM/OFDMA frame in an effort to save power. | 2009-12-24 |
20090316807 | METHOD AND APPARATUS FOR ACHIEVING TRANSMIT DIVERSITY AND SPATIAL MULTIPLEXING USING ANTENNA SELECTION BASED ON FEEDBACK INFORMATION - A method of achieving transmit diversity in a wireless communication system is disclosed. The method comprises encoding and modulating data stream based on feedback information, demultiplexing symbols to at least one encoder block, encoding the demultiplexed symbols by the at least one encoder block, transforming the encoded symbols by at least one inverse fast Fourier transform (IFFT) block, and selecting antennas for transmitting the symbols based on the feedback information. | 2009-12-24 |
20090316808 | RADIO RECEPTION DEVICE, RADIO TRANSMISSION DEVICE, RADIO BASE STATION, RECEPTION METHOD, AND TRANSMISSION METHOD - An OFDM radio reception device | 2009-12-24 |
20090316809 | Method for transmitting channel quality information - There is provided a method for transmitting channel quality information in a wireless communication system. Over-all band of the wireless communication system is divided by a plurality of sub-bands. The method includes selecting a first sub-band having the highest CQI among the plurality of sub-bands, transmitting CQI of the first sub-band and transmitting CQI of a second sub-band, the second sub-band having the CQI lower than the first sub-band, wherein the number of CQI levels of the second sub-band is less than that of CQI levels of the first sub-band. Overheads incurred by CQI feedback can be reduced. | 2009-12-24 |
20090316810 | METHODS FOR TRANSMITTING AND RECEIVING A MULTICARRIER SIGNAL COMPRISING ISOLATED PILOTS, CORRESPONDING DEVICES AND COMPUTER PROGRAM PRODUCTS - A method is provided for receiving a received signal corresponding to a multicarrier signal transmitted by at least one transmitter via a transmission channel, the multicarrier signal being formed by a temporal succession of symbols including of a set of data elements with real values, including informative data elements, and reference data elements called pilots for at least some of the symbols. The reception method includes step of first estimation of the transmission channel. Due to at least one of the pilots being an isolated pilot in transmission, the reception method further includes a step of extracting the isolated pilot, and a step of locally refining the first estimation. | 2009-12-24 |
20090316811 | DATA COMMUNICATION METHOD, COMMUNICATION SYSTEM AND MOBILE TERMINAL - In a communications system which complies with LTE including a base station | 2009-12-24 |
20090316812 | OFDM Communication Device and Guard Interval Length Determining Method - An OFDM communication device ( | 2009-12-24 |
20090316813 | Transmitter, Receiver, Transmission Method and Reception Method - A phase relationship between signal sequences obtained by space-time-coding transmission signals is controlled so as to give a difference in peak power between the signal sequences to be transmitted from separate transmission antennas, and either one or both of the signal sequences are controlled so as to minimize a rate of a peak power of one of the signal sequences to an average transmission power of the signal sequences. | 2009-12-24 |
20090316814 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is disclosed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT2009-12-24 | |
20090316815 | METHODS AND SYSTEMS FOR OVERHEAD REDUCTION IN A WIRELESS COMMUNICATION NETWORK - Methods and apparatus are provided for increasing throughput in a wireless communication system by reducing the amount of overhead transmitted to certain user terminals. Overhead due to control information may be reduced for these certain user terminals by selecting a low repetition factor. Overhead may be further reduced for these certain user terminals by selecting a modulation/coding scheme with a higher data rate for transmitting the control information. The selection may be based on channel conditions associated with the user terminals, such as signal-to-interference-plus-noise ratios (SINRs). | 2009-12-24 |
20090316816 | METHOD FOR MULTIPLE USE SUBCHANNELS - Systems and methods for multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing (OFDM) are provided. In one embodiment, a remote unit for communicating with a host unit using OFDM is provided, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration. The remote unit comprises a modulator for modulating up to a plurality of tones with upstream information using orthogonal frequency division multiplexing, wherein the modulator is configured to adjust a carrier frequency and timing of the plurality of tones such that spectrally overlapping tones transmitted from the remote unit and at least one other remote unit of the plurality of remote units are orthogonal and combine to form an OFDM waveform when received at the host; and wherein a first tone of the plurality of tones carries both control data and payload data. | 2009-12-24 |
20090316817 | CHANNEL ESTIMATION FOR WIRELESS SYSTEMS WITHOUT MATRIX INVERSION - In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion. | 2009-12-24 |
20090316818 | RECEIVER - A receiver employing an OFDM system which uses a frequency band that is constituted by a plurality of subchannels, and receiving a signal added a phase rotation which is made to respectively differ for each transmission antennas of transmitter and transmitted from the transmission antennas, having an informing portion which informs the transmitter of an information in subchannel units for deciding a phase rotation which is added to the signal. | 2009-12-24 |
20090316819 | TRANSMITTER - A transmitter employing an OFDM system, having a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers modulated by data or a known signal, a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and, and an allocating portion which allocates a plurality of groups to a receiver. | 2009-12-24 |
20090316820 | OFDM RECEIVER HAVING MEMORY CAPABLE OF ACTING IN A SINGLE-CHIP MODE AND A DIVERSITY MODE - An OFDM receiver is provided. The OFDM receiver comprises a Fourier transform (FFT) module, a storage device, an equalizer, and a diversity combiner module. The Fourier transform module transforms a time-domain symbol into an OFDM symbol. The storage device stores OFDM symbols. When operated in a single chip mode, the storage device stores more OFDM symbols outputted from FFT module than operated in a diversity mode. The equalizer retrieves the OFDM symbols from the storage device or the FFT module, estimates the channel frequency response of a transmission channel, and equalizes the OFDM symbol according to the channel frequency response. When operated in the diversity mode, the diversity combiner module receives the OFDM symbols and an alignment signal from a diversity OFDM receiver. | 2009-12-24 |
20090316821 | APPARATUS AND METHOD FOR POWER CONTROL IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for power control are provided. In a receiver in a mobile communication system, a Receive (Rx) signal received through a plurality of antennas is estimated. A power ratio between a traffic channel of the Rx signal and a pilot channel of the Rx signal is determined. A Log Likelihood Ratio (LLR) value is determined using the power ratio between the traffic channel and the pilot channel, a symbol of the traffic channel, and an Rx signal estimation value to which precoding is applied. | 2009-12-24 |
20090316822 | METHOD OF TRANSMITTING SIGNALS FOR MULTIPLE ANTENNA SYSTEM - A signal transmission method for use in a multi-antenna system includes: receiving a complex signal using N antennas and M timeslots as a single unit, and generating a space-time code (STC) for performing interleaving and phase-shifting operations of the received complex signal; and applying the space-time code (STC) to the received complex signal, and transmitting the resultant signal. Therefore, the signal transmission method provides a space-time code (STC) provides a space-time code (STC) having higher performance and lower encoding complexity, and can effectively transmit the signal via the multi-antenna system. | 2009-12-24 |
20090316823 | METHODS AND SYSTEMS FOR IMPROVING FRAME DECODING PERFORMANCE USING KNOWN INFORMATION - A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of a response message expected to be transmitted in response to a previously transmitted message. Example expected response messages include clear to send (CTS) messages transmitted in response to request to send (RTS) messages and positive acknowledgement (ACK) messages transmitted in response to messages with data payloads. | 2009-12-24 |
20090316824 | METHOD FOR TRANSMITTING A SEQUENCE OF SYMBOLS FOR EXPLOITING TRANSMIT DIVERSITY - An embodiment of a method for transmitting data through at least a channel in a wireless communication system, the method comprising at least the steps of:
| 2009-12-24 |
20090316825 | Radio Transmitter Apparatus, Radio Receiver Apparatus, and Wireless Communication System - A wireless communication system capable of obtaining diversity gain without fail even when the distribution of the reception qualities is large. In a radio transmitter apparatus ( | 2009-12-24 |
20090316826 | PREDISTORTION AND POST-DISTORTION CORRECTION OF BOTH A RECEIVER AND TRANSMITTER DURING CALIBRATION - A post-distorter compensates for receiver nonlinearity in calibration mode. Linearized receiver-side output from the post-distorter is used to correctly compensate for transmitter-side nonlinearities in calibration mode. The post-distorter also compensates for receiver-side nonlinearities during normal receive mode. Thus, the post-distorter features dual modes of use, a calibration mode, wherein calibration signals received from the adjacent transmitter are linearized by the post-distorter and a normal receive mode, wherein communication signals from a remote transmitter are linearized by the post-distorter. | 2009-12-24 |
20090316827 | AMPLITUDE SUPPRESSING APPARATUS AND SIGNAL TRANSMITTING APPARATUS - An amplitude suppressing apparatus includes a differential circuit that calculates a differential value of amplitude of an input signal at a point when the amplitude reaches a predetermined threshold. The amplitude suppressing apparatus also includes an amplitude suppressing circuit that suppresses the amplitude of the input signal on the basis of the differential value calculated by the differential circuit. | 2009-12-24 |
20090316828 | APPARATUS, AND ASSOCIATED METHOD OF PHASE-OFFSET MODULATION, FOR SPACE-TIME CODED WIRELESS COMMUNICATION SYSTEMS - An apparatus, and an associated methodology, for facilitating communication of data in a wireless communication systems. Binary data are modulated to form modulated symbols on parallel paths. The symbols formed on one of the parallel paths are phase-offset by a phase rotator to form phase-offset symbols. The parallel paths of symbols provide the symbols, both the phase-offset symbols and the symbols that are not phase-offset, to an Alamouti encoder. As a result, the dynamic range of the transmitted RF signals is reduced due to the introduction of the phase offset between the symbols of the parallel paths applied to the Alamouti encoder. | 2009-12-24 |
20090316829 | METHOD AND SYSTEM FOR TRANSMIT DIVERSITY FOR CHIP-TO-CHIP COMMUNICATIONS - Aspects of a method and system for transmit diversity for chip-to-chip communications may include transmitting a plurality of signals generated in accordance with a transmission diversity protocol via a plurality of transmit antennas integrated in/on a first chip. The plurality of signals may be received at a second chip, the second chip comprising one or more receive antennas. One or more received signals may be processed in accordance with the transmission diversity protocol. Modulation frequencies at the first chip and/or demodulation frequencies at the second chip may be received via a communication device comprising the first chip and/or the second chip. The modulation and the demodulation frequencies may be received on a link operating in a frequency band that is different from one or more receive frequencies used for the receiving of the plurality of signals, and the frequency band of the link may be an ISM band. | 2009-12-24 |
20090316830 | Method and transmitting device for encoding data in a differential space-time block code - A method and a corresponding transmitting device to encode data with a differential space-time block code. A code matrix is calculated recursively from a momentary data matrix with a previous code matrix as a DSTBC block with symbols that are to be transmitted, the data matrix is formed from at least two data symbols that are to be transmitted, and the amplitude is modulated. Amplitude modulation data is encoded into an amplitude difference of at least two data symbols within each individual DSTBC block. | 2009-12-24 |
20090316831 | TRANSMITTING/RECEIVING SYSTEM AND METHOD OF PROCESSING DATA IN THE TRANSMITTING/RECEIVING SYSTEM - A receiving system and a data processing method are disclosed. The receiving system includes a receiving unit, a demodulator, a first handler, and a second handler. The receiving unit receives a broadcast signal including fast information channel (FIC) data, mobile service data, and a service signaling channel, the FIC data including a field indicating that a table signaling service guide bootstrap information to the service signaling channel is included therein, and the mobile service data and the service signaling channel are packetized into an RS frame belonging to a desired ensemble. The demodulator demodulates the received broadcast signal. The first handler acquires service guide bootstrap information from the table included in the service signaling channel. And, the second handler accesses a service guide announcement channel by using the service guide bootstrap information. | 2009-12-24 |
20090316832 | Increasing Channel Capacity Without Needing to Reduce Signal to Noise Margin Due to Inter-Symbol Interference (ISI) by Using Three States +1, -1 and NO - Basic idea is that in addition to sending +1 and −1 a third state is sent. This third state is a lack of any transmission whatsoever. Suggests sending frequency 0 for symbol 0, frequency 1 for symbol 1, frequency 2 for symbol 2, frequency 0 & frequency 1 for symbol 3 etc. Also suggests using 2 frequencies and phase modulating each. Frequency 1 has 2 possible phase states and frequency 2 has 2 possible phase states, therefore 4 bits can be coded. If send only frequency 2 with its two phase states, this enables us to send two more bits. If send neither frequency 1, nor frequency 2 this indicates 1 other bit state. Therefore 8 bits can be coded. | 2009-12-24 |
20090316833 | RECEIVER - A receiver employing an OFDM system which uses a frequency band that is constituted by a plurality of subchannels, and receiving a signal added a phase rotation which is made to respectively differ for each transmission antennas of transmitter and transmitted from the transmission antennas, having a virtual subchannel quality estimating portion which estimates the quality of a propagation path in the case of same phase rotation is added to signal transmitted from transmitter, each group configured with a plurality of consecutive subcarriers. | 2009-12-24 |
20090316834 | APPARATUS FOR CONTROLLING SENSITIVITY BY USING DIGITAL GATING IN RECEIVER AND RECEIVER WITH THE SAME - Disclosed is a wireless communication system, more particularly, a receiver and a chipset for DSRC. A receiver includes: a low noise amplifier (LNA) amplifying a received radio (RF) signal while minimizing amplification of noise included in the received RF signal; a mixer down-converting a frequency of an output signal of the LNA to output an intermediate frequency (IF) signal; a frequency synthesizer generating and outputting a frequency signal for the frequency-down conversion of the mixer to the mixer; a bandpass filter passing a necessary band of a channel in an output signal of the mixer; a log amplifier amplifying an output signal of the bandpass filter in log scale and outputting a received signal strength indicator of an output signal of the bandpass filter; a detector comparing an output of the log amplifier with a predetermined binary threshold value, outputting a first binary signal when the output of the log amplifier is less than the predetermined binary threshold value, and outputting a second binary signal when the output of the log amplifier is equal to or greater than the predetermined binary threshold value; a switch serially connected with an output terminal of the detector; and a switch controller comparing the received signal strength indicator of the output signal of the log amplifier with an RSSI threshold, opening the switch when the received signal strength indicator is less than the RSSI threshold, and closing the switch when the received signal strength indicator is equal to or grater than the RSSI threshold. | 2009-12-24 |
20090316835 | POWER SAVINGS IN HIERARCHICALLY CODED MODULATION - A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator. | 2009-12-24 |
20090316836 | SINGLE-WIRE, SERIAL, DAISY-CHAIN DIGITAL COMMUNICATION NETWORK AND COMMUNICATION METHOD THEREOF - A digital communication network including several receivers and a communication method for the digital communication network are provided. Each of the receivers includes a first port and a second port. The first port of the first receiver is coupled to the microcontroller. The first port of each of the receivers except the first receiver is coupled to the second port of the previous receiver. Each receiver further includes a chain register. The chain registers of the receivers are mutually connected through the first ports and the second ports, forming a virtual global queue. By utilizing the characteristics of the virtual global queue, the system and the method achieve bi-directional, single-wire, serial communication without the encumbrance of assigning addresses or identification codes to the receivers. | 2009-12-24 |
20090316837 | SAMPLE REARRANGEMENT FOR A COMMUNICATION SYSTEM WITH CYCLIC EXTENSION - Signal detectivity is improved by implementation of address adjustment to reorder samples and to discard undesired samples. Such reordering is utilized when the time order of received samples are distorted and/or corrupted, which can occur in at least three situations. If the samples are distorted in time order, the samples are rearranged to allow the samples to return to proper order. The samples, if corrupted, are discarded and replaced with zero samples. | 2009-12-24 |
20090316838 | Cordic based complex tuner with exact frequency resolution - Systems and methods are disclosed that include selecting a sampling frequency and a tuning resolution frequency. These systems and methods may further include determining a wordlength of the phase accumulator, a numeric representation of the phase range, and a reduced representable value of a phase accumulator. In addition, these systems and methods may include operating the phase accumulator, where the phase accumulator creates an output phase accumulator signal. These systems and methods may further includes adjusting the angle of the output phase accumulator signal, where the output phase accumulator signal is adjusted based upon the operation of the phase accumulator, where adjusting the angle of the output phase accumulator signal creates an adjusted output phase accumulator signal and operating a CORDIC module, and where the CORDIC module performs operations upon the output phase accumulator signal based upon the parameters of the phase accumulator. | 2009-12-24 |
20090316839 | Apparatus and method for adaptively correcting I/Q imbalance - An apparatus and method for adaptively correcting I/Q imbalance, which is used in a receiver for correcting a received I/Q imbalanced signal to thus eliminate the I/Q imbalance. First, an interference amount caused by interference from an imbalanced in-phase signal to an imbalanced quadrature-phase signal is computed and accordingly subtracted from the quadrature-phase signal, so that a corrected quadrature-phase signal without phase imbalance is obtained. Next, a power of output in-phase signal, a power of output quadrature-phase signal, and a target are compared to thus determine an in-phase scaling factor and a quadrature-phase scaling factor. Finally, the imbalanced in-phase signal is multiplied by the in-phase scaling factor to thus obtain the output in-phase signal, and the corrected quadrature-phase signal is multiplied by the quadrature-phase scaling factor to thus obtain the output quadrature-phase signal. | 2009-12-24 |
20090316840 | METHODS AND SYSTEMS FOR STC SIGNAL DECODING USING MIMO DECODER - Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down. | 2009-12-24 |