22nd week of 2009 patent applcation highlights part 28 |
Patent application number | Title | Published |
20090135882 | Sensor Arrangement - A sensor arrangement includes a tube, a measurement head and a holder. The measurement head includes a composite of at least two flexible plastic films and a sensing element arranged between the plastic films. The sensing element is electrically contacted via metallic conductor traces. The measurement head contacts a circumference of the tube and is arranged between the holder and the tube and is pressed by the holder onto the tube. | 2009-05-28 |
20090135883 | Multi-Layered Thermal Sensor for Integrated Circuits and Other Layered Structures - A compact resistive thermal sensor is provided for an integrated circuit (IC), wherein different sensor components are placed on different layers of the IC. This allows the lateral area needed for the sensor resistance wire on any particular IC layer to be selectively reduced. In a useful embodiment, a plurality of first linear conductive members are positioned in a first IC layer, in spaced-apart parallel relationship with one another. A plurality of second linear conductive members are similarly positioned in a second IC layer in spaced-apart parallel relationship with one another, and in orthogonal relationship with the first linear members or in parallel with existing wiring channels of the second IC layer. Conductive elements respectively connect the first linear members into a first conductive path, and the second linear members into a second conductive path. A third conductive element extending between the first and second layers connects the first and second conductive paths into a single continuous conductive path, wherein the path has a resistance that varies with temperature. A device responsive to an electric current sent through the continuous path determines temperature of the path from the path resistance. Two or more of the thermal sensors could be connected in series, for use in measuring critical IC circuits. | 2009-05-28 |
20090135884 | ELECTRONIC THERMOMETER WITH FLEX CIRCUIT LOCATION - An electronic thermometer is configured for ease and accuracy in construction. A probe of the thermometer includes a flex circuit containing electronic components used to measure temperature and transmit signals to a calculating unit of the thermometer. A resilient locator can function to pre-position the flex circuit prior to final fixation so that the electronic components are reliably positioned in manufacture | 2009-05-28 |
20090135885 | NON-LINEAR FEEDBACK CONTROL LOOPS AS SPREAD SPECTRUM CLOCK GENERATOR - This patent disclosure presents circuits, systems and methods to spread a clock signal to produce a random spreading for the clock signal that offers the maximum possible power density reduction for the spurious radiations generated from the clock signal and its harmonics. These new inventions utilize a non-linear feedback control loop to assist in generation of the spread spectrum clock and result in electronic products that can pass the FCC requirements for spurious radiations generated by the clock signal and its harmonics without utilizing expensive shielding and other EMI suppression methods. | 2009-05-28 |
20090135888 | Spectrally shaped generalized multitone direct sequence spread spectrum modulation | 2009-05-28 |
20090135889 | METHOD AND SYSTEM FOR CODE REUSE AND CAPACITY ENHANCEMENT USING NULL STEERING - The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes that may correlate to those already being used within the same sector/cell. This, in return, provides capacity improvement proportional to the number of added base station (BS) antennas for each cell. An antenna null steering technique for code allocation maintains the cross correlation properties of the codes only for the desired user and to obtain a gain in capacity improvement. | 2009-05-28 |
20090135890 | Physical layer device having an analog SERDES pass through mode - A physical layer device (PLD) includes a first serializer-deserializer (SERDES) device and a second SERDES device. Each SERDES device includes an analog portion with a serial port that is configured to communicate serial data with various network devices, and a digital portion that is configured to communicate parallel data with other various network devices. The PLD includes a first signal path that is configured to route serial data signals between the analog portions of the SERDES devices, bypassing the digital portions of the SERDES devices. Therefore, the SERDES devices can directly communicate serial data without performing parallel data conversion. A second signal path is configured to route recovered clock and data signals between the analog portions of the SERDES devices, but still bypassing the digital portions of the SERDES devices. The recovered clock and data signals are then regenerated before being transmitted over a network device. | 2009-05-28 |
20090135891 | SYMBOL MODULATION ACCURACY MEASURING DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM - An accuracy of a symbol modulation is accurately measured. A symbol modulation accuracy measuring device receives a signal to be measured from a signal output device, which outputs ideal symbol data generated by the ideal symbol data generating unit, and modulated by the symbol modulation unit according to a symbol modulation as the signal to be measured, via a memory, and measures the accuracy of the symbol modulation. The symbol modulation accuracy measuring device includes a symbol demodulation unit that demodulates the signal to be measured according to a symbol demodulation, and a modulation accuracy measuring unit that measures the accuracy of the symbol modulation based on a result of the demodulation by the symbol demodulation unit, and the ideal symbol data recorded in the ideal symbol data generating unit of the signal output device. The symbol modulation accuracy measuring unit acquires the ideal symbol data from the ideal symbol data generating unit via a digital interface or a recording medium. | 2009-05-28 |
20090135892 | APPARATUS AND METHOD FOR MEASURING CARRIER-TO-INTERFERENCE-AND-NOISE RATIO OF LOGICAL BAND USING DOWNLINK PREAMBLE - Provided are an apparatus and method for measuring a carrier-to-interference-and-noise ratio (CINR) using down-link preambles. More particularly, provided are an apparatus and method that measure CINRs according to a plurality of logical bands in a downlink band-adaptive modulation and coding (AMC) channel mode zone using preambles and determine whether or not to switch to another channel mode or logical band on the basis of the CINRS. According to the apparatus and method, it is possible to easily measure a plurality of CINRs and switch to a better channel mode or another logical band using the measured CINRs. Consequently, the optimum channel environment can be maintained. | 2009-05-28 |
20090135893 | Method and System for Weight Determination in a Spatial Multiplexing MIMO System for WCDMA/HSDPA - Certain aspects of the method may comprise generating models for a received plurality of spatially multiplexed communication signals for multiple channels from a plurality of transmit antennas. A calculated signal to noise ratio (SNR) of each multiple channel may be maximized based on the generated models. A phase and an amplitude of at least a portion of the received plurality of spatially multiplexed communication signals may be adjusted based on a plurality of amplitude and phase correction weights determined from the maximized SNR. | 2009-05-28 |
20090135894 | SIGNAL RECEIVING CIRCUIT UTILIZING TIMING RECOVERY PARAMETER GENERATING CIRCUIT - A signal receiving circuit includes: a sampler, for receiving an analog signal and sampling the analog signal according to a sampling clock to generate a sampling signal; an ADC, coupled to the sampler, for converting the sampling signal to a digital signal; an equalizer, coupled to the ADC, for equalizing the digital signal to generate an equalized digital signal; a quantizer, coupled to the equalizer for quantizing the equalized digital signal to generate a processed digital signal; and a timing recovery circuit, directly connected to the output terminal of the sampler and coupled to the quantizer, for adjusting the timing of the sampling clock according to the processed digital signal and the digital signal. Timing recovery parameter generating circuits are also disclosed. | 2009-05-28 |
20090135895 | Self-calibrated adaptive equalization system and methods of performing the same - A self-calibrating, adaptive equalization system for generating an ideal digital signal is disclosed. The adaptive equalization system includes an equalizer and a high-gain buffer. The equalizer includes a first equalizer loop that feeds-back a control voltage to the equalizer and the high-gain buffer that includes a second equalizer loop that feeds-back a high-pass-to-low-pass filter ratio signal. Each of the first and second equalizer loops has a high-pass and a low-pass filter, rectifying circuits for each of the filters, and an integrating circuit that compares signal energy output from the rectifiers. The adaptive equalization system generates an ideal digital signal. | 2009-05-28 |
20090135896 | FAST AUTOMATIC GAIN CONTROL - An apparatus comprising a slicer configured to produce a symbol decision value and a symbol error value utilizing, at least in part, a slicer input signal; and an automatic gain controller configured to facilitate the automatic control of a gain applied to the slicer input signal by producing a gain control signal, the automatic gain controller comprising a decision-directed amplitude error detector configured to utilize, at least in part, the symbol decision value and the symbol error value to produce an amplitude error signal, and a loop filter configured to utilize the amplitude error signal to produce the gain control signal. | 2009-05-28 |
20090135897 | SEMICONDUCTOR INTEGRATED CIRCUIT AND ELECTRONIC DEVICE - An electronic device ( | 2009-05-28 |
20090135898 | METHOD AND USER DEVICE FOR RECEIVING DIGITAL TRANSMISSIONS - The invention provides a user device ( | 2009-05-28 |
20090135899 | Method of selecting a reference picture - In one embodiment, the method includes obtaining a reference picture list including multiple reference pictures, and obtaining a field reference picture index associated with the current field macroblock. A frame reference picture index is determined based on the field reference picture index divided by 2, and a field reference picture is selected based on the frame reference picture index and the field reference picture index. | 2009-05-28 |
20090135900 | Method of selecting a reference picture - In one embodiment, the method includes obtaining a reference picture list including multiple reference pictures, and obtaining a field reference picture index associated with the current field macroblock. A frame reference picture index is determined based on the field reference picture index, and a field reference picture having a parity equal to a parity of the field macroblock is selected if the field reference picture index is an even value. | 2009-05-28 |
20090135901 | COMPLEXITY ADAPTIVE VIDEO ENCODING USING MULTIPLE REFERENCE FRAMES - Encoding techniques are provided that consider decoder complexity when encoding video data. A complexity adaptive encoding algorithm encodes video data by encoding current frame data based on reference frame data taking into account an expected computational complexity cost of decoding the current frame data. | 2009-05-28 |
20090135902 | BITRATE CONTROL DEVICE FOR CONTROLLING BITRATE OF VIDEO DATA - A bitrate control device controls bitrate of video data and includes: a setting module that sets, for each frame in the video data, a target code amount to be used in encoding the frame by an encoding module for maintaining a given bitrate; an adjusting module that adjusts the target code amount set by the setting module based on given information; and a managing module that is configured to perform: saving a code amount corresponding to an amount reduced in the target code amount by the adjusting module in a virtual storage management buffer having a given upper limit, when the adjusting module adjusts to reduce the target code amount; and withdrawing a code amount corresponding to an amount increased in the target code amount by the adjusting module from the virtual storage management buffer, when the adjusting module adjusts to increase the target code amount. | 2009-05-28 |
20090135903 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Disclosed herein is an image processing device for coding image data, which is divided by a given pixel count into macroblocks, on a macroblock-by-macroblock basis, the image processing device including: a quantization section configured to quantize image data on a macroblock-by-macroblock basis; a detection section configured to detect a macroblock containing a given color pixel from the image data; and a control section configured to control the quantization section, the control section including a distance calculation section configured to calculate the distance between a given image position in a picture of the image data and an image position in the macroblock detected by the detection section, and a bitrate control section configured to control the quantization section so that a higher bitrate is assigned with decreasing distance calculated by the distance calculation section. | 2009-05-28 |
20090135904 | High-Dynamics Image Transmission System, Encoding and Decoding Units and Methods Therefor - This high dynamic picture transmission system comprises a coding unit able to generate:
| 2009-05-28 |
20090135905 | PROTECTING COMMERCIALS WITHIN ENCODED VIDEO CONTENT - In one embodiment, a method comprises identifying an identifiable video object from a video picture of a digital video having video content and commercial content, the video picture contained within the video content; encoding the identifiable video object as a video overlay object; encoding the commercial content based on generating a first key frame, and storing the video overlay object within the first key frame as an object that is not displayed as part of the commercial content; and encoding the video picture based on generating a second key frame that includes a default video object in place of the identifiable video object, the default video object including an overlay reference to the video overlay object within the first key frame, wherein unavailability of the video overlay object during rendering of the second key frame causes display of the default video object to visually corrupt the video picture. | 2009-05-28 |
20090135906 | Method and Apparatus for Transmitting Multiple Video Streams Over a Video Channel - There are provided methods and apparatus for transmitting multiple video streams over a video channel. A video encoder is provided for encoding a plurality of streams corresponding to a plurality of programs. The video encoder includes an encoder ( | 2009-05-28 |
20090135907 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 2009-05-28 |
20090135908 | VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded. | 2009-05-28 |
20090135909 | MOTION COMPENSATION METHOD AND INTEGRATED CIRCUIT UTILIZING THE SAME - An integrated circuit capable of motion compensation and a method thereof is disclosed. The integrated circuit comprises a partition unit and a motion compensation unit. The partition unit receives a video block having a predetermined block dimension, and partitions the video block into sub-blocks with a sub-block dimension less than the predetermined block dimension when the video block is on a frame boundary of a video frame. The motion compensation unit, coupled to the partition unit, performs motion compensation on the sub-blocks. | 2009-05-28 |
20090135910 | VIDEO APPARATUS TO COMBINE GRAPHICAL USER INTERFACE (GUI) WITH FRAME RATE CONVERSION (FRC) VIDEO AND METHOD OF PROVIDING A GUI THEREOF - A video apparatus to combine a graphical user interface (GUI) with a frame rate conversion (FRC) video. The video apparatus combines a GUI with an area of a video in which a frame rate is converted. By performing a FRC, a moving image having increased quality is provided for a user, and minimizing artifacts from occurring around a boundary of a still image such as a GUI. | 2009-05-28 |
20090135911 | FAST MOTION ESTIMATION IN SCALABLE VIDEO CODING - Scalable Video Coding is recently attracting attentions due to its high flexibility. The current H.264/AVC scalable extension has adopted the Motion Compensated Temporal Filter (MCTF) framework to provide temporal scalability. In this paper, described is another fast motion estimation (ME) algorithm based on the MCTF framework. Simulation results show that the herein described algorithm can reduce the encoding complexity significantly while maintaining similar bit rate and PSNR, comparing with existing fast ME algorithms implemented in the reference software. | 2009-05-28 |
20090135912 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 2009-05-28 |
20090135913 | VECTOR SELECTION DECISION FOR PIXEL INTERPOLATION - Methods and apparatus, including computer program products, implementing and using techniques for determining motion vectors to be used for interpolation of intermediary frames in a digital video sequence are disclosed. A first image frame including several image patches is received. A second image frame including one or more image patches corresponding to the image patches in the first image frame is received. For each image patch that occurs in both frames, the following operations occur: forward and backward motion vectors are determined for the image patch in the first image frame, forward and backward motion vectors are determined for the image patch in the second image frame, one motion vector from the first image frame and one motion vector from the second frame are selected and the selected motion vectors are used to establish an intermediary position of the image patch in an interpolated frame between the frames. | 2009-05-28 |
20090135914 | IMAGE INFORMATION ENCODING METHOD AND ENCODER, AND IMAGE INFORMATION DECODING METHOD AND DECODER - In an image information encoder ( | 2009-05-28 |
20090135915 | VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded. | 2009-05-28 |
20090135916 | IMAGE PROCESSING APPARATUS AND METHOD - An image processing apparatus for reducing memory bandwidth usage is provided. The image processing apparatus includes an informative image processing controller, a processing unit and a mixer. The informative image processing controller generates a main image and performs resolution conversion on a first designated region of the main image. The processing unit is coupled to the informative image processing controller for generating image information defining the first designated region according to a first image and outputting the image information. The mixer is coupled to the informative image processing controller for mixing the main image and the first image to generate a displayed image for displaying onto a display unit. | 2009-05-28 |
20090135917 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - In a picture coding method for generating a coded signal corresponding to each picture by coding a plurality of coded signals, a switching picture which is capable of switching a plurality of coded signals and subsequent pictures of the switching picture can refer to only a group of pictures of the same time in the coded signals. More specifically, the case where picture numbers of an adjacent picture of an S picture and the S picture are not continuous is not considered as an error. | 2009-05-28 |
20090135918 | SYSTEM AND METHOD FOR PROVIDING A VARIABLE FRAME RATE AND ADAPTIVE FRAME SKIPPING ON A MOBILE DEVICE - A processor and method are provided for decoding a multimedia file having video and audio data streams that are configured to be played in synchronization. Frames of the video stream are decoded and played with the audio and, to compensate for saturation of the processor usage, two procedures are performed. The first procedure operates at a first periodic interval and slows down the frame rate to reduce processor usage if needed. The second procedure first attempts to speed up the video to catch up to the audio if they are out of sync and if this cannot be done in the next time interval, the decoding of a select number of frames is skipped such that the video and audio data streams are resynchronized. | 2009-05-28 |
20090135919 | Method and an apparatus for embedding data in a media stream - A method for enhancing a media file. The method comprises encoding a media file for a real time exchange of communications between a plurality of terminals, embedding a non-media communication of the real time exchange into the media file, and forwarding the embedded media file to at least one of the plurality of terminals. | 2009-05-28 |
20090135920 | MODULATOR, FILTER, METHOD OF CONTROLLING GAIN OF FILTER, AND CODE MODULATING METHOD - A modulator being made small in size, low in costs, low in power consumption, small in heat generation and spurious signals. The modulator includes multipliers ( | 2009-05-28 |
20090135921 | Two-Dimensional DPCM with PCM Escape Mode - Methods of, and devices, and systems for differential pulse code modulation (DPCM) having predictions and quantization parameters based on proximate lines of buffered quanta of information where pulse code modulation (PCM) is employed as a backup means. | 2009-05-28 |
20090135922 | POWER SAVINGS IN OFDM-BASED WIRELESS COMMUNICATION - In a wireless communications system using Orthogonal Frequency Division Multiplex technology, changing the nature of the signals being transmitted/received may be used to reduce power consumption. In one embodiment, reducing the number of carriers that are being employed may be used to decrease power consumption by permitting a reduced clock rate for driving some of the circuitry. Similarly, increasing the duration of the symbols used to encode the data may be used to reduce the clock rate. Other power savings may be found by using single-rail processing, allowing some of the signal processing circuitry to simply be shut down. | 2009-05-28 |
20090135923 | Mobile channel estimation for DVB-T COFDM demodulator - A channel estimator for use in a DVB-T system is capable of high Doppler performance without incurring restrictive delay spread limitations, in a hardware efficient manner. A first channel impulse response is generated that has ambiguity due to under-sampling in the frequency domain. A filter is then used to filter scattered pilots to generate a mask that is capable of resolving the ambiguities. In at least one approach, a finite impulse response filter is used during the mask generation process to generate a snapshot of the channel frequency response in non-real time. In another approach, an infinite impulse response filter is used during the mask generation process to generate a channel frequency response in real time. | 2009-05-28 |
20090135924 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATIONS - Provided is a radio communication base station device capable of acquiring both a multi-user diversity effect and a frequency diversity effect simultaneously in multi-carrier communications. In this devices modulation units ( | 2009-05-28 |
20090135925 | TRANSMITTER, OFDM COMMUNICATION SYSTEM, AND TRANSMISSION METHOD - In a cellular system using an OFDM scheme, a transmitter multiplies subcarriers for channel estimation by codes and transmits them, the codes being such that a phase difference φ of the code multiplied with consecutive subcarriers for channel estimation is constant, and a code of every M consecutive subcarriers (M being 2 or an integer greater than 2) is mutually orthogonal with a code multiplied with same subcarriers of another transmitter. | 2009-05-28 |
20090135926 | JOINT CONSTELLATION MULTIPLE ACCESS - A method for communication includes defining N respective symbol constellations in a signal space for N transmitters ( | 2009-05-28 |
20090135927 | METHOD AND APPARATUS OF TRANSMITTING AND RECEIVING CHANNEL PARAMETER ATTRIBUTES IN WIRELESS COMMUNICATION SYSTEMS - A method and apparatus of transmission and reception of SetManagementSameChannelParameters, the method comprising generating a SetManagementSameChannelParameters attribute comprising an 8 bit Length field, an 8 bit AttributeID field, a 6 bit PilotAdd field, a 6 bit PilotCompare field, a 6 bit PilotDrop field, a 4 bit PilotDropTimer field, a 1 bit DynamicThresholds field, a 0 or 6 bit SoftSlope field, a 0 or 6 bit AddIntercept field, a 0 or 6 DropIntercept field, a 4 bit NeighborMaxAge field and a variable bit Reserved field and transmitting the SetManagementSameChannelParameters attribute over an OFDM communication link. | 2009-05-28 |
20090135928 | DEVICE, APPARATUS, AND METHOD FOR LOW-POWER FAST FOURIER TRANSFORM - A device, apparatus and method for performing a Fast Fourier Transform (FFT). The Fast Fourier Transform (FFT) processing device includes a coefficient generator, a memory, and an accumulator. The coefficient generator is configured to generate a first set of coefficient values from one or more twiddle factor coefficients. The memory stores the first set of coefficient values. The accumulator receives and accumulates one or more coefficient values from the first set of coefficient values, the accumulator generating one or more output values based on the accumulated one or more coefficient values. | 2009-05-28 |
20090135929 | Receiving Apparatus, Communication System, Receiving Method and Program - A receiving apparatus according to the present invention has a plurality of synchronizing circuits which is provided corresponding to different preamble signals of a reception signal and operate simultaneously at the time of receiving the preamble signals so as to output synchronous signals, a correlation value comparing section which compares correlation values of the synchronous signals output from the plurality of synchronizing circuits, and a synchronizing section which determines whether the received signal is for the subject apparatus based on a comparison result from the correlation value comparing section. | 2009-05-28 |
20090135930 | METHOD FOR GENERATING A DELAY IN THE TRANSMISSION OF A MULTICARRIER SIGNAL, AND CORRESPONDING COMPUTER PROGRAM, STORAGE MEANS AND DEVICE - A method is provided for generating a delay in the transmission of a multicarrier signal formed by a time-dependent series of symbols, in which the symbols include a set of complex time-dependent samples, in which each symbol includes a useful part and a guard time. The method includes the following steps: writing the samples forming the multicarrier signal in a memory; reading the memory with a variable latency corresponding to the delay; and modifying the variable latency by duplicating or suppressing at least one sample contained in a guard time. | 2009-05-28 |
20090135931 | RECEPTION APPARATUS, RECEPTION METHOD AND PROGRAM - Disclosed herein is a reception apparatus, including, an orthogonal frequency division multiplexing signal reception section, a first filter section, a subtraction section, a second filter section, a coefficient production section, and a Fast Fourier Transformation mathematic operation section. | 2009-05-28 |
20090135932 | POWER-LINE CARRIER COMMUNICATION APPARATUS - The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D/A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A/D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series. | 2009-05-28 |
20090135933 | COMMUNICATION TERMINAL DEVICE AND COMMUNICATION RELAY METHOD - There is provided a mobile station device in a multi-hop system capable of realizing relay of communication of another station while suppressing increase of power consumption of the local station. In this device, at timing t | 2009-05-28 |
20090135934 | METHOD FOR THE TRANSMISSION ON MULTIPLE-CARRIER COMMUNICATIONS SYSTEMS, AND CORRESPONDING TRANSMITTER AND COMPUTER-PROGRAM PRODUCT - A method for loading bits over a set of subcarriers of a multiple-carrier communications system comprises the operation of associating with the subcarriers respective numbers of bits chosen from among a plurality of available constellations. The method envisages definition of a performance target for the system and execution of bit loading, guaranteeing the aforesaid target on a plurality of subcarriers. The performance target can be a target error rate, such as a bit-error rate (BER), or else be transferred into a constraint, such as, for example, a threshold, in a metric of log-likelihood ratios (LLRs). In this case, there is preferably envisaged application to the signals received within the multiple-carrier system a function that estimates a signal to noise ratio on each sub-carrier. The aforesaid metric of log-likelihood ratios (LLRs) is hence defined as a function of said signal to noise ratios. | 2009-05-28 |
20090135935 | DIGITAL TV RECEIVER HAVING BUILT-IN DIVERSITY STRUCTURE - A receiver is provided that comprises: a channel estimator; a first path for feeding the estimated information into a frequency domain equalizer; a second path for feeding the estimated information into a time domain equalizer; and a combiner or selector to combine or select equalized information from the frequency domain equalizer and the time domain equalizer. | 2009-05-28 |
20090135936 | DIGITAL BROADCASTING TRANSMISSION/RECEPTION DEVICES CAPABLE OF IMPROVING A RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels. | 2009-05-28 |
20090135937 | Trellis constellation shaping - A method for trellis constellation shaping is disclosed. In one embodiment, this method comprises receiving two or more input bits and filtering at least one of the two or more input bits to create two or more filtered output bits. The step of filtering at least one input bit introduces at least one extra bit. The method then encodes the input bits which are not filtered to create encoded bits and stores the encoded bits and the filtered bits in a buffer. A processing element may be configured to perform Viterbi type processing on the filtered bits to create processed bits. The method combines at least one of the processed bits with at least one of the buffered bits to create a combined bit set from the buffered bits and then performs mapping on the combined bet set to thereby map the combined bit set into a constellation. | 2009-05-28 |
20090135938 | PERFORMANCE OF A TRELLIS-BASED DECODER USING STATES OF REDUCED UNCERTAINTY - A method and system are provided for improving the performance of a trellis-based decoder. States with reduced uncertainty (SRUs) are defined for one or more predetermined fields in an encoded message. Metrics are set for the SRUs such that candidate paths through a trellis-based decoding process are eliminated for those states that are not SRUs. | 2009-05-28 |
20090135939 | APPARATUS AND METHOD FOR SPACE-TIME CODING IN MULTIPLE-ANTENNA SYSTEM - Disclosed is a space-time coding apparatus and method to flexibly adjust diversity/multiplexing orders in a multiple-antenna system. The transmitting apparatus for the multiple-antenna system includes a space-time code controller, an encoder, a demultiplexer, and a space-time encoder. The space-time code controller generates space-time codes by determining bases according to a multiplexing order required by a receiver. The encoder modulates and encodes data destined for the receiver in accordance with a predetermined modulation level. The demultiplexer demultiplexes data received from the encoder in order to transmit the data through at least one antenna. The space-time encoder space-time-codes the demultiplexed data using the space-time codes. | 2009-05-28 |
20090135940 | WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission device of the present invention includes n (where n is an integer of two or more) transmission antennas and a delay imparting section for delaying transmission signals supplied to the n transmission antennas by a maximum delay time (n−1)T or less based on a delay time T dependent upon a communication signal, which indicates whether to transmit the transmission signals by way of frequency diversity or multiuser diversity. | 2009-05-28 |
20090135941 | Method for Digital Wireless Message Transmission Over a Broadband Mobile Radio Channel - In an OFDM multi carrier modulation method, M sub-carriers are used in a frequency band of a broadband mobile radio channel and several symbols are used in a time band. With application of a MIMO multi-antenna method with T transmitting antennae and R receiving antennae, for all sub-carriers and all symbols, a single, pre-determined, channel-matched transmission strategy is used, which is described by a maximum of T*R complex values on the signal side, independent of the species of the MIMO multi-antenna method and independent of the size of the frequency/time bands. | 2009-05-28 |
20090135942 | APPARATUS AND METHOD FOR TRANSMITTING DATA USING MULTI-ANTENNA - Provided are an apparatus and method for transmitting data using a multi-antenna. The apparatus includes a transmission buffer selecting unit for selecting transmission buffer of an antenna group corresponding to characteristics of each aggregated Medium access control Protocol Data Units (MPDU) when a list of aggregated MPDUs to transmit is received; a data transmitting unit for generating a list of aggregated MPDUs to transmit with storage information of the aggregated MPDUs, transferring the generated list to the transmission buffer selecting unit and transmitting corresponding aggregated MPDUs through the selected transmission buffer; and a timing controlling unit for controlling a transmission timing of each aggregated MPDU. | 2009-05-28 |
20090135943 | COMMUNICATION APPARATUS AND CONTROLLING METHOD THEREOF - To determine an appropriate transmission rate more efficiently in communication which uses multiple-input multiple-output technique, a communication apparatus which selects one of a plurality of transmission rates determined by a set of modulation schemes for streams and communicates with an external device using the MIMO technique of performing transmission using a plurality of streams includes a change unit which changes the transmission rate, and a determination unit which determines, based on a transmission power to be allocated to each stream and the modulation scheme of each stream, the transmission rate to be changed by the change unit so as to make the power per bit of each stream at the transmission rate after change remain unchanged or increase. | 2009-05-28 |
20090135944 | Cooperative-MIMO Communications - Spatial subchannel codes for wireless devices operating in a cooperative antenna array are generated using an asymptotically optimal decoding algorithm, such as a trellis-exploration algorithm similar to the Viterbi algorithm. A trellis may be constructed using a number of desired subchannels, at least one code length, and a number of code-chip parameters. A fitness function is derived from a mathematical relationship between codes, and may include some measure of correlation of the codes. The selected codes correspond to paths having optimal path metrics derived from the fitness function. Multiple iterations through the trellis may be performed to refine a selection of the codes. | 2009-05-28 |
20090135945 | ECHO CANCELLATION AND ECHO CHANNEL ESTIMATION SYSTEM USING MULTIPLE ANTENNAS - Disclosed herein is an echo cancellation and echo channel estimation system that can relay transmit signals without interference with echo signals by canceling the undesired echo signals received by a relay. The echo cancellation and echo channel estimation system is designed to relay signals between a transmitter and a receiver through a relay using multiple antennas. The echo cancellation and echo channel estimation system includes a receive antenna, a preprocessing vector generation module, an echo cancellation module, and a transmit array antenna. The receive antenna receives a transmit signal from the transmitter and an echo signal via an echo channel. The preprocessing vector generation module generates a preprocessing vector and applies the preprocessing vector, the transmit signal and the echo signal, received from the receive antenna, to the echo cancellation module. The echo cancellation module cancels only the echo signal by multiplying the preprocessing vector, the transmit signal, and the echo signal. The transmit array antenna receives a retransmit signal from the echo cancellation module and resends the retransmit signal to the receiver. | 2009-05-28 |
20090135946 | Tiled-building-block trellis decoders - A multi-level encoded signal is encoded according to at least an upper-level code and a lower-level code. In a receiver, a modified type of a multistage decoder is deployed. The upper-level code is decoded to produce a sequence of tentative upper-level coding decisions independently of the lower-level code. The lower-level code is next decoded in such a way that the decoding is conditioned upon at least one of the tentative upper-level decisions. The lower-level decoder thereby produces a sequence of lower-level decisions. The upper-level code is then decoded a second time, this time conditioned upon at least one of the lower-level decisions, to produce a second, more reliable sequence of upper-level coding decisions. The lower-level decision sequence and the second upper-level decision sequence are delivered from the decoder as output sequences. | 2009-05-28 |
20090135947 | METHOD OF SELECTING CANDIDATE VECTOR AND METHOD OF DETECTING TRANSMISSION SYMBOL - The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected. | 2009-05-28 |
20090135948 | SYSTEM AND METHOD FOR DELIVERY OF VIDEO, CONTENT ON DEMAND AND IP PACKETS - The present application describes a method and filter for shaping a series of pulses spaced in time for subsequent transmission in a communications system, each of the pulses having a magnitude comprising the steps of providing a generic shaped pulse, for each pulse in the series, generating a shaped pulse by scaling the generic shaped pulse by an amount proportional to the magnitude, wherein at least a portion of each generated pulse overlaps in time with at least a portion of at least one subsequent generated pulse, and combining the overlapping portions of the generated pulses. | 2009-05-28 |
20090135949 | DIGITL PRE-DISTORTION FOR OTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM)SIGNALS | 2009-05-28 |
20090135950 | MAXIMIZING DATA RATE BY ADJUSTING CODES AND CODE RATES - The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment. | 2009-05-28 |
20090135951 | METHOD AND APPARATUS FOR POWER CONTROL TECHNIQUES IN AN OFDM BASED RECEIVER - A method comprising the steps of: providing a receiver based on synchronous, sequential, digital design techniques, wherein the receiver is subdivided into stages or sub-devices; providing a primary reset, which initializes the receiver to a known state; and providing a primary clock for changing the known state based on other inputs to the receiver. An OFDM receiver comprising: a primary reset, which initializes the receiver to a known state; and a primary clock for changing the known state based on other inputs to the receiver, wherein the receiver is divided into a plurality of sub-devices forming a sequential device; and a control signal for overriding the primary clock and holding a plurality sequential elements in a reset state. | 2009-05-28 |
20090135952 | Portable Terminal Having Automatic Searching Function For Broadcasting Channel And Method For Searching Broadcasting Channel Automatically In Portable Terminal - A portable terminal having a function for automatically searching for a broadcasting channel, which may automatically set the broadcasting channel according to variation of a broadcasting zone, and a method of automatically searching for a broadcasting channel in a portable terminal are disclosed. A wireless transceiver receives a system information from a base station, and a controller obtains a receivable broadcasting channel based on the system information. Accordingly, the broadcasting channel may be automatically searched based on the location of the portable terminal, and users desired broadcasting channel may be represented. | 2009-05-28 |
20090135953 | Receiving circuit - A receiving circuit includes a frame memory to store received data of one frame, a de-rate matching circuit to generate data before encoding by reading the received data from the frame memory and performing de-rate matching in a reverse manner to rate matching performed on the received data at a transmitting end, and a TTI memory to store the data before encoding. | 2009-05-28 |
20090135954 | DYNAMIC THRESHOLD DETECTOR - A burst detector featuring a dynamic threshold that is calculated according to the detection efficiency while operating in a noisy environment. In one embodiment, signals from various directions are multiplied by appropriate weights, wherein the weights are a function of the FAR, the throughput, and/or various modem indications. | 2009-05-28 |
20090135955 | RADIO FREQUENCY CONTROL FOR COMMUNICATION SYSTEMS - An electronic device capable of performing automatic frequency control (AFC) to maintain frequency and timing without good received bursts, in which an oscillation unit and a baseband processing unit are provided. Wherein, the baseband processing unit computes a compensation adjustment according to a prediction model and stored information regarding a previous digital value adjustment when detecting that the baseband processing unit is incapable of controlling the oscillation unit according to received bursts from the remote communication unit, and adjusts the oscillation unit according to the determined compensation adjustment. | 2009-05-28 |
20090135956 | METHOD AND APPARATUS FOR PRECISE OPEN LOOP TUNING OF REFERENCE FREQUENCY WITHIN A WIRELESS DEVICE - A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode. | 2009-05-28 |
20090135957 | SYSTEM AND METHOD FOR COMMUNICATING DATA USING WEIGHTED BIT SOFT DECISIONS FOR DIFFERENTIALLY ENCODED PHASE SHIFT KEYING - A receiver includes a signal input for receiving a differentially-encoded quadrature phase-shift keyed (DEQPSK) communication signal. A demodulator performs bit decisions on a received coherent symbol and bit decisions on a received differential symbol. A processor is operative with the demodulator and scales a soft decision by a factor from 0 to 1 when the results of the bit decisions on the received coherent branch and differential branch are different. | 2009-05-28 |
20090135958 | Controlled Transmission of Data in a Data Transmission System - This disclosure relates to controlled transmission of data in a data transmission system. Data from data interface elements may be transmitted in a controlled manner during the guard intervals or cyclic expansions of received RF signals. The received RF signals may be initially analyzed by a receiver to gather its characteristics. Based on the characteristics, the data interface elements are instructed to transfer the data during the guard intervals of the incoming RF signals. | 2009-05-28 |
20090135959 | APPARATUS AND METHOD FOR DETECTING A MISSING PULSE IN COMPLEMENTARY CODED IRREGULAR SIGNALS - An apparatus and method for decoding complementary coded irregular data streams including a missing pulse detector circuit. The missing pulse detector circuit includes electrical circuit components configured to receive first and second irregular data streams, and output a data stream corresponding to a valid input data stream only when the two received data streams are bit-for-bit complements of each other. | 2009-05-28 |
20090135960 | Communication Device - In a communication device for receiving signals from devices that become communication partners, received signals from the respective devices are identified. Each of the devices that become communication partners is provided with a frequency spectrum of a pattern specific to each of the devices. In the communication device, storage means stores correspondence between information identifying the devices that become communication partners and the frequency spectrums provided to the respective devices, acquisition means acquires a frequency spectrum contained in a received signal, identification means compares the frequency spectrum acquired by the acquisition means with the frequency spectrums stored by the storage means to identify a device corresponding to the frequency spectrum that coincides with the frequency spectrum acquired by the acquisition means and which is stored by the storage means. | 2009-05-28 |
20090135961 | System and Method for Scanning Sequential Logic Elements - System and Method for Scanning Sequential Logic Elements A digital system and method for scanning sequential logic elements are disclosed. The digital system may comprise a plurality of sequential logic elements subdivided into power domains, wherein at least one of the power domains is power gated; a scan chain configured for processing a scan data sequence; a scan enable switch configured for controlling a scan mode; and at least one shadow engine, wherein the at least one shadow engine comprises a control circuit. At least some of the power domains may be interconnected to the scan chain with the scan enable switch, and the scan enable switch may control the scan mode by asserting a scan enable signal. The at least one power gated power domain with one or more sequential logic elements to be power gated may be bypassed via the at least one shadow engine. | 2009-05-28 |
20090135962 | Digital slicing device - A digital slicing device is provided for making a numerical value determination with respect to an inputted modulated symbol so as to output a corresponding symbol. The digital slicing device includes a demodulating unit, a slicing unit and a re-modulating unit. The demodulating unit is for collecting at least two successive modulated symbols and for demodulating the two modulated symbols according to a modulation algorithm so as to generate two demodulated symbols. The slicing unit is for rounding the two demodulated symbols so as to generate two rounded demodulated symbols. The re-modulating unit is for re-modulating the two rounded demodulated symbols according to the modulation algorithm so as to generate two re-modulated symbols corresponding to the two modulated symbols. The two modulated symbols are generated simultaneously through conversion using the modulation algorithm. | 2009-05-28 |
20090135963 | Apparatus and method for adaptive receive signal decoding based on channel variation in communication system - An apparatus for adaptively decoding based on a channel variation at a receiver of a communication system supporting an Alamouti mode is provided. The apparatus includes a channel variation estimator for estimating the channel variation; a channel estimator for estimating a channel value of successive channel periods or a channel value of each channel period by comparing the estimated channel variation with a threshold; an Alamouti decoder for decoding a receive signal using an Alamouti method when the estimated channel variation is less than or equal to the threshold; and a Spatial Multiplexing (SM) decoder for decoding the receive signal using an SM method having a square channel matrix when the estimated channel variation is greater than the threshold. | 2009-05-28 |
20090135964 | METHOD OF CALCULATING LOG-LIKELIHOOD RATIO AND METHOD OF DETECTING TRANSMISSION SIGNAL - The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio. | 2009-05-28 |
20090135965 | Flexible rate matching - Flexible rate matching. No constraints or restrictions are placed on a sending communication device when effectuating rate matching. The receiving communication device is able to accommodate received transmissions of essentially any size (e.g., up to an entire turbo codeword that includes all systematic bits and all parity bits). The receiving communication device employs a relatively small-sized memory to ensure a lower cost, smaller sized communication device (e.g., handset or user equipment such as a personal wireless communication device). Moreover, incremental redundancy is achieved in which successive transmissions need not include repeated information therein (e.g., a second transmission need not include any repeated information from a first transmission). Only when reaching an end of a block of bits or codeword to be transmitted, and when wrap around at the end of such block of bits or codeword occurs, would any repeat of bits be incurred within a later transmission. | 2009-05-28 |
20090135966 | METHOD FOR RECOVERING A BIT STREAM FROM A RADIO SIGNAL - The invention relates to a method for recovering a bit stream from a radio signal ( | 2009-05-28 |
20090135967 | METHOD AND CIRCUIT SYSTEM FOR DECIDING A SYMBOL UPON RECEPTION OF RECEIVED SYMBOLS COUPLED WITH A QUADRATURE SIGNAL PAIR - The invention relates to a method and a circuit system for deciding a symbol (S) upon reception of received symbols coupled with a quadrature signal pair (I, Q). For deciding a symbol upon reception of an input signal using received symbols (S) coupled with a quadrature signal pair, wherein phase noise (PN) and Gaussian noise (GN) are superimposed on at least one such received symbol, the phase noise (PN) as well as the Gaussian noise (GN) are determined or estimated for at least one such received symbol (S). This is advantageously achieved by the fact that when the phase noise (PN) and the Gaussian noise (GN) are determined or estimated, a differentiation is made between the phase noise (PN) and the Gaussian noise, and a result of the differentiating determination or estimation is used for controlling reception parameters for decisions concerning subsequently received symbols (S). In particular, the measured values of the phase noise (PN) are orthogonalized to the Gaussian noise (GN). | 2009-05-28 |
20090135968 | PHASE-ERROR REDUCTION CIRCUITRY FOR AN IQ GENERATOR - Phase-error-reduction circuitry for an IQ generator, wherein the phase-error-reduction circuitry is arranged to receive I and Q input signals from the IQ generator and to produce I and Q output signals, and wherein the phase-error-reduction circuitry is arranged to sample the I and Q input signals to tend to reduce a phase error between the I and Q output signals. | 2009-05-28 |
20090135969 | METHOD AND APPARATUS FOR COMPLEMENTARY CUMULATIVE DISTRIBUTION DRIVEN LEVEL CONVERGENCE FOR SPECTRUM SENSING - A method for use in a digital communications receiver for controlling an input signal level ( | 2009-05-28 |
20090135970 | DIRECT CONVERSION RECEIVER - A direct conversion receiver wherein even when signals are continuously received, the automatic gain control can be implemented in accordance with the signal levels from which DC offset voltages have been removed. The direct conversion receiver comprises a low-noise amplifier | 2009-05-28 |
20090135971 | NARROWBAND GAIN CONTROL OF RECEIVER WITH DIGITAL POST FILTERING - An Automatic Gain Control (AGC) circuit as used in a digital receiver that utilizes a main loop filter that is of a relatively wide bandwidth. A pre-filter, wideband variance is determined from the input digital signal, and a post-filter, narrowband variance is also determined. The wideband and narrowband variances are then compared to determine if the wideband signal power indicates a variance level that is too great to permit normal loop operation. By reapplying this difference in the power levels to the filter output as needed, such as by a scaling operation, the loss in dynamic range is effectively recovered. In a preferred embodiment, an adjustable gain input amplifier feeds an intermediate frequency (IF) signal to an analog-to-digital converter (ADC). The digitized IF signal is then down-converted to a baseband frequency and subjected to digital filtering. A narrowband sample variance (P | 2009-05-28 |
20090135972 | INTERFERING SIGNAL CHARACTERIZING QUANTITY STORING METHOD AND DEVICE, INTERFERING SIGNAL CHARACTERIZING QUANTITY ACQUIRING METHOD AND DEVICE, AND INTERFERING SIGNAL SUPPRESSING METHOD AND DEVICE - An object is to identify interfering signals coming at random timings from different radio stations. In order to attain this object, a method for storing the characterizing quantity of an interfering signal included in a received signal comprises a characterizing quantity calculation step of calculating the characterizing quantity of the received signal; a received signal determination step of determining a probability that a desired signal is included in the received signal, and determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal; and an interfering signal characterizing quantity storage step of storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal. | 2009-05-28 |
20090135973 | Filter and Method for Suppressing Effects of Adjacent-Channel Interference - A filter device and method for suppressing effects of Adjacent-Channel Interference of a received signal in a Frequency-Division-Multiple-Access system by filtering a baseband signal of the received signal. The filter device comprises an interference filter, which is a complex digital Single-Input-Multiple-Output, SIMO, filter that is adapted to simultaneously generate a first signal filtered at an upper-frequency-band and a second signal filtered at a lower-frequency-band, wherein the first signal is separate from the second signal. The filter device also comprises a selector adapted to select one of the signals as the output from the filter device. | 2009-05-28 |
20090135974 | IMPULSE WAVEFORM GENERATING APPARATUS AND RADIO-FREQUENCY PULSE WAVEFORM GENERATING APPARATUS - An impulse waveform generating apparatus includes a multistage delay pulse signal generating part for generating a plurality of delay pulse signals by a timing signal; a signal source signal generating part for generating a signal source signal indicating the frequency component of an impulse waveform signal by the delay pulse signals; an envelope formation signal generating part for generating an envelope formation signal indicating the amplitude component of the impulse waveform signal by the delay pulse signals; and a mixer part for multiplying the signal source signal by the envelope formation signal to generate a prescribed impulse waveform signal. The impulse waveform generating apparatus generates the impulse waveform signal from the timing signal. Therefore, the circuit arrangement requires no digital-to-analog converter, the operational frequency of each element can be reduced, and the power consumption can be reduced. | 2009-05-28 |
20090135975 | APPARATUS AND METHOD FOR RECOVERING DATA - An apparatus for recovering data and a method thereof are provided. The apparatus includes a reference clock generator which generates a reference clock, and a data recovering unit which detects an edge of received data and recovers the data using a time difference between a reference point of the reference clock and the detected edge. | 2009-05-28 |
20090135976 | RESOLVING BUFFER UNDERFLOW/OVERFLOW IN A DIGITAL SYSTEM - In a digital system with more than one clock source, lack of synchronization between the clock sources may cause overflow or underflow in sample buffers, also called sample slipping. Sample slipping may lead to undesirable artifacts in the processed signal due to discontinuities introduced by the addition or removal of extra samples. To smooth out discontinuities caused by sample slipping, samples are filtered to when a buffer overflow condition occurs, and the samples are interpolated to produce additional samples when a buffer underflow condition occurs. The interpolated samples may also be filtered. The filtering and interpolation operations can be readily implemented without adding significant burden to the computational complexity of a real-time digital system. | 2009-05-28 |
20090135977 | DEVICE FOR AND METHOD OF SIGNAL SYNCHRONIZATION IN A COMMUNICATION SYSTEM - A device for signal synchronization in a communication system, the device comprising a first detector configured to perform a first sliding correlation for a received signal and a pseudo-random noise (PN) sequence to obtain information on symbol timing, a second detector configured to identify a fractional carrier frequency offset (FCFO) using the information on symbol timing and the cyclic extension property of the PN guard interval (GI), a first multiplier configured to provide a first product by multiplying the received signal with the FCFO, and a third detector comprising a set of second multipliers configured to provide a set of second products by multiplying the first product with each of a set of phases related to integral carrier frequency offsets (ICFOs), a set of sliding correlators each being configured to perform a second sliding correlation for the PN sequence and one of the set of the second products, the set of sliding correlators providing a set of peak values, and a peak detector configured to identify an ICFO by detecting an index number of a maximal value among the set of peak values. | 2009-05-28 |
20090135978 | Apparatus and method for estimating and compensating sampling frequency offset - An apparatus and method for estimating and compensating sampling frequency offset are disclosed. Particularly, a linear mathematical scheme is employed to calculate the related phase difference for saving use of multipliers and storage circuit used for sampling frequency offset estimation and compensation in the conventional art. The preferred embodiment of the invention has a first step to receive signals by the offset estimating circuit. Next, the phase value for each signal is calculated, and the pilot signal therein is retrieved. Next, a phase difference is obtained by subtraction operation between the received symbols and the delayed pilot symbols. And a circuit for storing the phase differences is incorporated. Next, a phase difference between the adjacent symbols is obtained by accumulating the phases and processing the least-error-sum-of-squares operation. Therefore, an estimation value of the sampling frequency offset of a communication system is obtained, and further to compensate the offset. | 2009-05-28 |
20090135979 | METHOD AND DEVICE FOR PROCESSING THE FREQUENCY SHIFT OF THE CARRIER FREQUENCY OF A SIGNAL MODULATED WITH A QUADRATURE CONTINUOUS SINGLE-CARRIER MODULATION - A frequency shift of a carrier frequency of an input signal is estimated with a frequency estimator in order to obtain an estimate value. Then, the estimate of the frequency shift is refined, and the carrier frequency is corrected in consequence, with a phase-locked loop that is initialized with the estimate value. The phase-locked loop has a locking frequency range that is narrower than a locking frequency range of the frequency estimator. | 2009-05-28 |
20090135980 | Nuclear Fusion Conducted at Near Absolute Zero Temperatures - A method for producing nuclear fusion in a fusion chamber, comprising the steps of: (a) Obtaining cooled high velocity nuclear particles; (b) Causing said particles to impact a target, and (c) Harvesting the energy thereby released. | 2009-05-28 |
20090135981 | Method for transforming element and producing energy - To provide a reliable method for producing energy by means of nuclear condensation. | 2009-05-28 |
20090135982 | Neutron Generator - A neutron generator includes an ion source disposed in a pressurized environment containing an ionizable gas. The ion source includes a substrate with a bundle of carbon nanotubes extending therefrom. The ends of the nanotubes are spaced from a grid. Ion source voltage supply circuitry supplies a positive voltage potential between the substrate and the grid of the ion source to cause ionization of the ionizable gas and emission of ions through the grid. An ion accelerator section is disposed between the ion source and a target. The ion accelerator section accelerates ions that pass through the grid towards the target such that collisions of the ions with the target cause the target to generate and emit neutrons therefrom. The ion source, accelerator section and target are housed in a sealed tube and preferably the carbon nanotubes of the bundle are highly ordered with at least 10 | 2009-05-28 |
20090135983 | Cross-Section Reducing Isotope System - An isotope production target rod for a power generating nuclear reactor is provided. The isotope production target rod can include at least one rod central body including an outer shell that defines an internal cavity and a plurality of irradiation targets within the internal cavity. The irradiation targets can be positioned in a spatial arrangement utilizing a low nuclear cross-section separating medium to maintain the spatial arrangement. | 2009-05-28 |