Class / Patent application number | Description | Number of patent applications / Date published |
455084000 | With a common signal processing stage | 71 |
20080274706 | Techniques for antenna retuning utilizing transmit power information - An embodiment of the present invention provides a radio frequency (RF) transceiver, comprising a transmitter, a receiver, an antenna connected to the transmitter and the receiver via a tuner, a power detector adapted to acquire information about transmit power, and wherein the tuner tunes the antenna based upon the transmit information to optimize the antenna in both the receive and transmit bands. | 11-06-2008 |
20090011720 | Bidirectional Frequency Converter and Radio Equipment Using Same - When a power supply switch is turned on and an RF signal and an LO signal are input to a bipolar transistor, a mixed signal of both signals is output as an IF signal. When the power supply switch is turned off, the bipolar transistor operates as two diodes connected between a base terminal and an emitter terminal and between the base terminal and a collector terminal. When the IF signal and the LO signal are input, the input signals are mixed with each other by the diodes and the RF signal is output. Accordingly, one frequency conversion has a plus conversion gain and when bidirectional frequency conversion is performed by the use of one frequency converter, an external circuit such as a signal path switching switch is not necessary. | 01-08-2009 |
20090088086 | MODIFIED DUAL BAND DIRECT CONVERSION ARCHITECTURE THAT ALLOWS EXTENSIVE DIGITAL CALIBRATION - A communication device may include one or more circuits in an integrated transmitter and receiver that includes a transmit path and a receive path. The transmit path may include an I processing baseband transmit path and a Q processing baseband transmit path. The receive path may include an I processing baseband receive path and a Q processing baseband receive path. The one or more circuits may enable sharing a first common filter by the I processing baseband transmit path and the I processing baseband receive path. The one or more circuits may also enable sharing a second common filter by the Q processing baseband transmit path and the Q processing baseband receive path. The first common filter and the second common filter are independently programmable to adjust a phase and/or a gain of the said first common filter, and/or a phase and/or a gain of the second common filter. | 04-02-2009 |
20090156138 | ARRAY ANTENNA SYSTEM AND TRANSMIT/RECEIVE MODULE THEREOF - There is provided one exemplary array antenna system having a plurality of arrayed element antennas and transmit/receive modules that are respectively connected with those element antennas and that apply a predetermined phase shift amount to transmitting signals to be supplied to the element antennas and to received signals received by the element antennas, wherein the transmit/receive module has one transmitting path that is connected to first and second element antennas and that amplifies and distributes the transmitting signal to the first and second element antennas after applying a predetermined transmitting phase shift amount and two receiving paths that amplify and apply respectively a receiving phase shift amount to the received signals received from the first and second element antennas. | 06-18-2009 |
20090305649 | SIGNAL PROCESSING DEVICE AND METHOD FOR OPERATING A SIGNAL PROCESSING DEVICE - A control circuit may be provided. In this case, an output of the control circuit is connected to a control input of a signal generator. Depending on internal signals which identify an operating state of a signal processing device, the control circuit generates a regulating signal at the output. The operating point of the signal generator is thereby set in such a way that a current consumption of the signal processing device is reduced, so that the signal quality is ensured in a sufficient manner. | 12-10-2009 |
20090318095 | DC Offset Calibration for a Radio Transceiver Mixer - An apparatus, method, and system for DC offset cancellation are provided herein. For instance, the apparatus can include a first commutating mixer switch and a second commutating mixer switch. The first commutating mixer switch can have a first input port configured to receive a first differential signal and a first differential output port. The second commutating mixer switch can have a second input port configured to receive a second differential offset signal and a second differential output port. The first and second differential output ports can be coupled to one another to provide a combined differential output signal. | 12-24-2009 |
20090325511 | RF SENSOR SYSTEM AND METHOD FOR OPERATING THE SAME - The embodiment provides a radio frequency sensor system comprising a radio frequency transmission terminal and a radio frequency reception terminal. The system comprises an oscillating circuit part for generating a plurality of frequency clocks, a signal coupler for coupling signals exiting on the radio frequency reception terminal, a signal detector for detecting change of the coupled signal according to movement of an object and generating a detection signal, and a controller for analyzing the detection signal and differentially employing the frequency clock according to the analysis result. | 12-31-2009 |
20100022203 | CIRCUIT INTEGRATING A TUNABLE ANTENNA WITH A STANDING WAVE RATE CORRECTION - An integrated electronic radio-frequency transceiver circuit, including: at least one terminal intended to receive a signal to be transmitted or to transmit a received signal; at least one planar antenna, with a settable resonance frequency; at least one bidirectional coupler having a primary line interposed between the terminal and the antenna and having the respective terminals of a secondary line providing data representative of the transmitted power and of the power reflected on the primary line side; at least one detector of the transmitted power and of the reflected power; and a circuit for selecting the resonance frequency of the antenna according to the ratio between the transmitted power and the reflected power. | 01-28-2010 |
20100062729 | CIRCUIT, PROCESS, AND USE OF A MEMORY FOR TRANSMITTING AND/OR RECEIVING IN A RADIO NETWORK - Circuit, process, and use of a memory for transmitting and/or receiving in a radio network, with a memory, which has a first interface for reading and writing and a second interface for reading and writing, with an arithmetic logic unit, which is connected to the first interface for reading and writing, with a control unit, which is connected to the second interface for reading and writing, and with a transmit/receive unit, which is connected to the control unit for writing received data via the second interface of the memory and for reading transmit data via the second interface of the memory. | 03-11-2010 |
20100136927 | CONFIGURABLE BASEBAND PROCESSING FOR RECEIVER AND TRANSMITTER AND METHODS FOR USE THEREWITH - A configurable transceiver includes an RF receiver section that generates at least one downconverted signal from a received RF signal. A receiver processing module processes at least one downconverted signal in a plurality of receiver stages to produce a stream of inbound data, wherein the receiver processing module is configurable in response to a control signal to selectively bypass at least one of the plurality of receiver processing stages. A transmitter processing module processes outbound data in a plurality of transmitter stages to produce at least one baseband signal, wherein the receiver processing module is configurable in response to the control signal to selectively bypass at least one of the plurality of transmitter processing stages. An RF transmitter section generates at least one RF signal from the at least one baseband signal. | 06-03-2010 |
20100144290 | MIXER ARCHITECTURES - Techniques for designing a single-balanced mixer coupled to a dummy portion with a dummy load to improve noise rejection. In an aspect, a single-ended signal (RF) from a stage preceding the mixer, e.g., a low-noise amplifier (LNA), is coupled to the input of the single-balanced mixer to be mixed with a local oscillator (LO) signal. A dummy portion replicating the topology of the single-balanced mixer is coupled to the single-balanced mixer to improve noise rejection, with the LO signal also provided to the dummy portion. The input of the dummy portion may be coupled, e.g., to a dummy load, which is designed to replicate the loading characteristics of the preceding stage, e.g., the LNA. | 06-10-2010 |
20100203847 | SINGLE INPUT/OUTPUT PORT RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT - A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency. | 08-12-2010 |
20100227572 | Method and Device for Dynamic Reconfiguration of a Radio Communications System - A radio communications system having a processing circuit, comprising a freely programmable logic control and processing receiving signals and transmission signals. The programming of the freely programmable logic control is modified in order to adjust the same to the sending operation and the receiving operation. Said modification carried out by charging and discharging the functional blocks in the freely programmable logic control via a bus system. The adjustment occurs without any interruption of the function of the radio communications system. | 09-09-2010 |
20100240325 | COMPENSATING METHOD FOR CAPACITY OF RADIO FREQUENCY MODULE AND A RADIO FREQUENCY MODULE - A compensation method for radio frequency module performance, it is adding a module monitoring circuit and a radio frequency power detection circuit to an existing radio frequency module, meanwhile replacing an existing hardware compensation circuit with a radio frequency digital controlled attenuator. The method replaces hardware method by a method of combining software of the module monitoring circuit and hardware such as module monitoring circuit, radio frequency digital controlled attenuator and radio frequency power detection circuit, as well as intelligently compensates the radio frequency module by using data obtained by predefined table or formula/algorithm, so as to adjust each characteristic index of the device accurately and easily, thus to improve performance of the radio frequency module and further meet the requirement of working stability of the radio frequency module. The present invention further provides a radio frequency module improved by such method. As such radio frequency module can be automatically debugged and tested by tools such as computer, so production efficiency will be improved. | 09-23-2010 |
20100297961 | METHOD AND SYSTEM FOR A RECONFIGURABLE FILTER THAT IS UTILIZED BY A RF TRANSMITTER AND A RF RECEIVER WHICH ARE INTEGRATED ON A SINGLE SUBSTRATE - An RF receiver and an RF transmitter, which are integrated in a single substrate, are operable to share a single reconfigurable filter to perform RF receiver filtering and RF transmitter filtering. The reconfigurable filter is configured to operate as a bandpass filter such as an image rejection bandpass filter for receiving RF signals by the RF receiver. The reconfigurable filter operates as a low pass filter for transmitting RF signals by the RF transmitter. The reconfigurable filter is configured to operate in a RF receiver filtering mode or a RF transmitter filtering mode, respectively. The reconfigurable filter is enabled to share configurable circuit components of the radio transceiver in both the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode. The reconfigurable filter transitions between the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode via reconfiguring the shared configurable circuit components. | 11-25-2010 |
20100311353 | MULTI-ELEMENT AMPLITUDE AND PHASE COMPENSATED ANTENNA ARRAY WITH ADAPTIVE PRE-DISTORTION FOR WIRELESS NETWORK - An improved communication system and method employing an actively controlled antenna array architecture is disclosed. The array contains a plurality of driven radiating elements that are spatially arranged having a pair of radiating elements fed with an RF signal predistorted so as to provide a controlled variation of the antenna array's elevation radiation pattern. High power amplifier (PA) efficiency is maintained by adaptive predistortion, coupled to each high power PA, while providing beam tilt and side lobe control. | 12-09-2010 |
20110003564 | OPERATION TEST METHOD FOR A CIRCUIT FOR TRANSMITTING AND RECEIVING SIGNALS - The invention concerns a test method for a transmitter-receiver circuit. This transmitter-receiver circuit includes an antenna, connected to a processing unit, arranged for receiving signals and converting their frequency. The transmitter-receiver circuit also includes a power amplifier connected to said antenna and arranged for sending transmission signals. The transmitter-receiver circuit also includes a test module, characterized in that it includes the steps consisting in:
| 01-06-2011 |
20110065397 | INFORMATION PROCESSING APPARATUS - According to one embodiment, an information processing apparatus includes a main body, a display unit rotatably attached to the main body via a coupling portion, first and second antennas provided in the display unit, a first mixing/distributing device provided in the display unit, first and second wireless communication modules provided in the main body, and a second mixing/distributing device provided in the main body. The signal transmission/reception between the first mixing/distributing device in the display unit and the second mixing/distributing device in the main body is executed via a cable which is inserted in the coupling portion. | 03-17-2011 |
20110081874 | SIGNAL TRANSCEIVING CIRCUIT AND NOISE REDUCTION CIRCUIT - A signal transceiving circuit, comprising: a receiver, for receiving a input signal; a transmitter, for transmitting an output signal; and a resistance circuit, for omitting the noise caused by the output signal to the input signal. The resistance circuit comprises: a voltage transferring circuit, for generating a voltage transferred signal, and a voltage dividing circuit, for voltage dividing the voltage transferred signal and the output signal, such that the voltage generated at the receiver is cancelled by the voltage generated by the voltage transferred signal at the transceiver. A noise reduction circuit that can be utilized in this signal transceiving circuit is also disclosed. | 04-07-2011 |
20110151805 | COUPLER AND WIRELESS COMMUNICATION DEVICE USING COUPLER - A coupler which is connectable to a feeder circuit of a wireless communication device is provided. The coupler includes a conductive element, a short circuit portion, a feeder portion and grounded plate. The conductive element has a substantially plane face. The short circuit portion is provided to the conductive element. The short circuit portion is positioned closer to a geometric gravity center of the conductive element than to an outer fringe of the face of the conductive element. The feeder portion is provided to the conductive element. The feeder portion is positioned separately from the short circuit portion. The feeder portion electrically connects the conductive element to the feeder circuit. The grounded plate is short-circuited to the conductive element via the short circuit portion. | 06-23-2011 |
20110165849 | INCREASED RECEIVE SENSITIVITY RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS - A front end circuit for coupling an antenna to a radio frequency (RF) transceiver is disclosed. An antenna port connectible to the antenna is provided, as well as a power amplifier coupled to a signal output of the RF transceiver and a low noise amplifier coupled to the signal input of the RF transceiver. The front end circuit includes a switching network that is connected to the antenna port, the power amplifier, and the low noise amplifier. Additionally, there is at least one resonant circuit and a control circuit coupled to a receive enable line of the transceiver. This resonant circuit defines a parallel resonance with a first resonant resistance in the operating frequency band upon activation in the receive mode. The resonant circuit also defines a substantially high transistor impedance upon deactivation in the transmit mode. | 07-07-2011 |
20110183634 | MOBILE STATION AND METHOD TO SELECT AN AMPLIFYING PATH THEREOF - A mobile station communicates with an access point (AP). The mobile station includes a low noise amplifier (LNA) path, a power amplifier (PA) path, a switch to select the LNA path or the PA path, and a controller directing the switch. The controller estimates amplifying power of the LNA, transmitting power and a sensitivity threshold of the PA. The controller receives a current received signal strength indication (RSSI) value of the AP. The controller determines whether amplifying power of the LNA path exceeds the PA sensitivity threshold. The controller transmits a selection signal directing the switch to select the LNA path if the amplifying power of the LNA path exceeds the sensitivity threshold of the PA. | 07-28-2011 |
20110223872 | WIRELESS TRANSCEIVING APPARATUS - A wireless transceiving apparatus is adapted for transceiving data between communication terminals and signal processing devices and includes transceiving devices. Each transceiving device includes: a number (M) of antenna units each including a number (T) of antenna elements; a number (M) of first processing unit for performing radio frequency (RF) beamforming; a number (M) of frequency converters; and a second processing unit for performing baseband beamforming. The wireless transceiving apparatus receives signals from the communication terminals and transmits processed signals to the communication terminals with an improved signal to interference plus noise ratio (SINR), thereby ensuring the quality of service for each communication terminal. | 09-15-2011 |
20110300814 | FRONT END MODULE WITH TONE INJECTION - A radio front end includes a power amplifier, a tone injection module, a duplexer, a balancing network, and a processing module. The tone injection module is operable, in a first mode, to produce a tone having a carrier frequency that is substantially similar to a carrier frequency of an inbound wireless signal. The duplexer is operable, in the first mode, to provide electrical isolation between the outbound wireless signal and a combination signal of the tone and inbound wireless signal and is operable, in a second mode, to provide electrical isolation between the outbound wireless signal and the inbound wireless signal. The processing module is operable to determine an amplitude of a tone component of the combination signal; correlate the amplitude of the tone component to an inbound frequency band isolation; and adjust baseband processing of a down converted representation of the combination signal based on the inbound frequency band isolation. | 12-08-2011 |
20120064844 | SEMICONDUCTOR INTEGRATED CIRCUIT AND RADIO COMMUNICATION DEVICE - According to one embodiment, a semiconductor integrated circuit includes a phase shifter, a plurality of phase matching detecting circuits, a output module. The phase shifter is configured to delay an input oscillation signal to generate a plurality of delay signals having phases different from each other. The plurality of phase matching detecting circuits is configured to store a second program for downloading a first program from an outside to the first area. The output module is configured to generate an output oscillation signal based on at least one of the delay signals having the phase difference determined to be within the predetermined range. | 03-15-2012 |
20120071111 | MERGED FILTER-TRANSCONDUCTOR-UPCONVERTER - In accordance with embodiments of the present disclosure, a merged filter-transconductor-upconverter for use in a wireless communication device is provided. | 03-22-2012 |
20120094618 | SIGNAL DETECTION APPARATUS AND SIGNAL DETECTION METHOD - A signal detection apparatus includes: a unit configured to select a particular detection target signal from among plural candidates of detection target signals; a unit configured to calculate a cyclic autocorrelation value at a center coordinate point specified by at least a cyclic parameter and a shift parameter of the particular detection target signal; a unit configured to calculate a cyclic autocorrelation value of each of (L−1) coordinate points belonging to a common area that is used commonly for different detection target signals; a unit configured to calculate a test statistic of the particular detection target signal; and a unit configured to determine presence or absence of the particular detection target signal according to a comparison result between the test statistic and a threshold, wherein the test statistic is calculated by using the cyclic autocorrelation value in each of the (L−1) coordinate points belonging to the common area. | 04-19-2012 |
20120142287 | OSCILLATOR CIRCUIT, RADIO COMMUNICATION DEVICE AND SEMICONDUCTOR INTEGRATED CIRCUIT - According to one embodiment, an oscillator circuit includes a first comparator circuit, a second comparator circuit, a first voltage control circuit, a second voltage control circuit, a clock generation circuit. The first comparator circuit is configured to compare a first voltage with a first threshold voltage to generate a first comparison result. The second comparator circuit is configured to compare a second voltage with a second threshold voltage to generate a second comparison result. The first voltage control circuit is configured to decrease the first voltage by a first voltage value in synchronization with timing when the first comparison result changes. The second voltage control circuit is configured to decrease the second voltage by a second voltage value in synchronization with timing when the second comparison result changes. | 06-07-2012 |
20120142288 | METHOD OF CONTROLLING WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION SYSTEM - A first device transmits a training signal with a fixed beam pattern, a second device receives the training signal while scanning a beam direction, and then it obtains first AWVs each having a main beam or sub-beam beam direction in an incoming direction in the second device. Next, the first device transmits a training signal while scanning a beam direction, the second device receives the training signal with a fixed beam pattern, and then it obtains second AWVs each having a main beam or sub-beam direction in an emitting direction in the first communication device. The roles of these two devices are interchanged and similar processes are performed in order to obtain third and fourth AWVs, and then one of first AWV combinations from first and second AWVs and one of second AWV combinations from third and fourth AWVs are used for wireless communication between these devices. | 06-07-2012 |
20120157012 | ASYMMETRIC GAIN COMMUNICATION DEVICE AND COMMUNICATION METHOD THEREOF - An asymmetric gain communication device and the communication method thereof are provided. With at least one receiving antenna and a transmitting antenna with different antenna gains, the antenna gains of the receiving antennas being greater than the antenna gain of the transmitting antenna and different from each other, the invention detects the communication signals of the receiving antennas for recording communication quality thereof. The mechanism switches in real time to an appropriate receiving antenna according to the received communication quality. This mechanism optimizes the signal transmission distance and communication stability. | 06-21-2012 |
20120157013 | Multi-Band Multi-Path Receiving and Transmitting Device and Method, and Base Station System - A multi-band multi-path receiving and transmitting device and method, and a base station system are provided. The multi-band multi-path receiving and transmitting device includes a broadband antenna, at least two multi-frequency couplers, a multi-band transceiver, and a signal processing module. The multi-band transceiver is adopted to decrease the number of the transceivers, thereby reducing the material cost and the mounting cost of the base station system. | 06-21-2012 |
20120171970 | WIRELESS COMMUNICATIONS DEVICE WITH AN ADJUSTABLE IMPEDANCE MATCHING NETWORK AND ASSOCIATED METHODS - A mobile wireless communications device includes a portable housing, a transmitter carried by the portable housing and configured to modulate an input signal, and an adjustable impedance matching network coupled downstream from the transmitter. An antenna is coupled downstream from the adjustable impedance matching network, and a non-directional coupler is coupled between the adjustable impedance matching network and the antenna. A feedback receiver is coupled to the non-directional coupler to generate a feedback signal. A controller is configured to control the adjustable impedance matching network based upon the input signal and the feedback signal. | 07-05-2012 |
20120171971 | LOW NOISE RF DRIVER - A low noise RF driver circuit including at least two series-coupled driver stages which receive a frequency modulated signal and an amplitude modulated signal that is applied to the supply voltage input of the driver stages, and provide a combined output signal. The RF driver circuit can be implemented in CMOS technology and integrated with other components of an RF communication subsystem, such as an RF transceiver circuit and power amplifier. Each driver stage includes a complementary pair of transistors with source degeneration resistors for linearity and gain control. | 07-05-2012 |
20120178386 | METHODS FOR ADJUSTING RADIO-FREQUENCY CIRCUITRY TO MITIGATE INTERFERENCE EFFECTS - An electronic device may transmit and receive wireless signals using wireless circuitry that is controlled by control circuitry. The wireless circuitry may include adjustable components such as adjustable antenna structures, adjustable front end circuitry, and adjustable transceiver circuitry. During characterization operations, the electronic device may be tested to identify operating settings for the wireless circuitry that lead to potential wireless interference between aggressor transmitters and victim receivers. The control circuitry can adjust the wireless circuitry to mitigate the effects of interference based on settings identified during characterization operations or real time signal quality measurements. | 07-12-2012 |
20120238221 | RADIO COMMUNICATION DEVICE, TRANSMISSION CIRCUIT AND BUFFER CIRCUIT - According to one embodiment, a buffer circuit has a capacitor comprising a first terminal and a second terminal, an input signal being inputted to the first terminal, a first inverting amplifier circuit configured to invert and amplify a signal of the second terminal of the capacitor, a second inverting amplifier circuit configure to invert and amplify an output signal of the first inverting amplifier circuit, and a MOS (Metal Oxide Semiconductor) transistor comprising a third terminal, a fourth terminal and a gate, the third terminal being connected to the second terminal of the capacitor, the fourth terminal being connected to a connection node of the first and the second inverting amplifier circuits, an inversion signal of the input signal being inputted to the gate. | 09-20-2012 |
20120322394 | Method and System for a Reconfigurable Filter That is Utilized by a RF Transmitter and a RF Receiver Which are Integrated on a Single Substrate - An RF receiver and an RF transmitter, which are integrated in a single substrate, are operable to share a single reconfigurable filter to perform RF receiver filtering and RF transmitter filtering. The reconfigurable filter is configured to operate as a bandpass filter such as an image rejection bandpass filter for receiving RF signals by the RF receiver. The reconfigurable filter operates as a low pass filter for transmitting RF signals by the RF transmitter. The reconfigurable filter is configured to operate in a RF receiver filtering mode or a RF transmitter filtering mode, respectively. The reconfigurable filter is enabled to share configurable circuit components of the radio transceiver in both the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode. The reconfigurable filter transitions between the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode via reconfiguring the shared configurable circuit components. | 12-20-2012 |
20130040583 | CLOCK SHARING BETWEEN CORES ON AN INTEGRATED CIRCUIT - An integrated circuit is described. The integrated circuit includes a global positioning system core that generates a GPS clock signal using an inductor-capacitor voltage controlled oscillator. The integrated circuit also includes a transceiver core configured to use the GPS clock signal. The transceiver core may not include a voltage controlled oscillator. | 02-14-2013 |
20130095775 | FRONT END MODULE AND WIRELESS SIGNAL PROCESSING APPARATUS HAVING THE SAME - There are provided a front end module increasing power efficiency used at the time of transmitting and receiving a signal and a wireless signal processing apparatus having the same. The front end module includes: a matching unit matching impedance of a signal path of a signal transmitted and received through an antenna in accordance with a control signal; a signal processing unit receiving power to perform sinal processing on the signal transmitted and received through the antenna; and a controlling unit comparing a current level used by the signal processing unit so as to perform signal processing on the transmitted and received signal with a power level of the signal transmitted and received through the antenna to thereby control impedance matching of the matching unit in accordance with a result of the comparison. | 04-18-2013 |
20130130632 | SIGNAL GENERATOR CIRCUIT AND RADIO TRANSMISSION AND RECEPTION DEVICE INCLUDING THE SAME - The disclosed signal generator circuit has a four-phase signal generator circuit generating four-phase signals with a first frequency; an eight-phase signal generator circuit performing ½ frequency division of the four-phase signals to generate eight-phase signals with a second frequency; a first to a fourth harmonic rejection mixer circuits multiplying a first four-phase signal and a second four-phase signal of the four-phase signals by a first to a third eight-phase signals and a third to a fifth eight-phase signals of the eight-phase signals with mutually different combinations; a subtractor subtracting between outputs of the first and the fourth harmonic rejection mixer circuits to generate a first output signal with a third frequency; and an adder adding between outputs of the second and the third harmonic rejection mixer circuits to generate a second output signal with a third frequency whose phase is different from the first output signal by π/2. | 05-23-2013 |
20130157593 | Systems and Methods for Time Synchronization of IEDs via Radio Link - The present disclosure provides systems and methods for synchronizing the time signals of master and remote IEDs using a radio link. According to one embodiment, a master IED may transmit an adjusted time signal to a remote IED via a radio signal. The master IED may determine a propagation delay between the master IED and a remote IED. The master IED may then adjust a master time signal by the propagation delay and transmit the adjusted time signal to the remote IED. Alternatively, a remote IED may request and receive a master time signal from a master IED via a radio signal. The remote IED may then determine the propagation delay and adjust the received master time signal accordingly. According to various embodiments, the time signal of a master and remote IED may be synchronized to within at least one millisecond. | 06-20-2013 |
20130157594 | CIRCUITS AND METHODS FOR INCREASING OUTPUT FREQUENCY OF AN LC OSCILLATOR - Disclosed are circuits and methods for increasing an output frequency of an inductance-capacitance (LC) oscillator. In some embodiments, the LC oscillator can be implemented as a voltage-controlled oscillator (VCO) having differential outputs. When the VCO is implemented on a die, wirebond connections from the outputs to a ground results in an effective inductance that impacts a maximum frequency associated with the VCO. An electrical connection such as a wirebond between the differential outputs yields a reduction in the effective inductance thereby increasing the maximum frequency. In some embodiments, the wirebond between the differential outputs can be configured so that its contribution to mutual inductance is reduced or substantially nil. | 06-20-2013 |
20130217345 | APPARATUS AND METHODS FOR ENVELOPE TRACKING SYSTEMS - Apparatus and methods for envelope tracking systems are disclosed herein. In certain implementations, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a DC-to-DC converter that generates a regulated voltage from a battery voltage and controls a voltage of the regulated voltage using a low frequency feedback signal. The envelope tracking system further includes an error amplifier that generates an output current using an envelope signal and a high frequency feedback signal. The low frequency feedback signal is based on a low frequency component of the power amplifier supply voltage and the high frequency feedback signal is based on a high frequency component of the power amplifier supply voltage. The error amplifier generates the power amplifier supply voltage by adjusting the magnitude of the regulated voltage using the output current. | 08-22-2013 |
20140113576 | Method and Apparatus for Signal Reception - A preferred embodiment of the present invention relates generally to enhancing quality of a received signal in a receiver. The received signal can be enhanced by reducing phase noise. A described method starts with determining input information, wherein the input information comprises at least one of the following pieces of information: a modulation-and-coding scheme of the received signal, a multiple-antenna configuration (MIMO configuration), a signal quality estimate of the received signal, or a frequency separation between the received signal and a transmitted signal. The method continues with selecting a bandwidth value on the basis of the input information. The selecting should result in such a bandwidth value which has an advantageous effect to the quality of the received signal. This advantageous effect is achieved by performing the following: using the bandwidth value for generating a local oscillator signal, and shaping the received signal with the local oscillator signal. | 04-24-2014 |
20140128010 | FRONT END DEVICE - A front end device includes an upper-level device and a lower-level device. The upper-level device includes an S/P interface unit. The lower-level device includes a parallel interface unit and a high-frequency processor. The S/P interface unit is connected to an RFIC and the parallel interface unit, receives a serial signal from the RFIC, converts the serial signal into a parallel signal, and transmits the parallel signal to the parallel interface unit. The parallel interface unit receives the parallel signal and supplies the parallel signal to the high-frequency processor. The high-frequency processor is connected between the RFIC and an antenna and performs certain processing on a high-frequency signal based on the parallel signal. | 05-08-2014 |
20140134964 | CASCADING BASEBAND PROCESSORS - Cellular processors are cascaded to provide different configurations, which result in higher-capacity base stations, increased numbers of simultaneous users over one frequency band, and/or aggregation of several carriers while still using only one radiofrequency (RF) chipset. The processors are aligned in both time and frequency, with each processor having a data port that allows data exchange with the other processors. The data alignment and exchange allow the processors, in the aggregate, to act as a single unit, resulting in a scalable architecture that can accommodate different system configurations. | 05-15-2014 |
20140357202 | ADAPTIVE ECHO CANCELLATION FOR RFID SYSTEMS - A radio-frequency identification (RFID) reader having fast-adaptive echo cancellation for backscatter-modulated signals is described. The echo cancellation includes subtracting an RF-level cancel signal from the received signal, where the cancel signal is generated based upon an error measured in the receive signal after down-conversion to baseband and low-pass filtering. The cancel signal is based upon a cumulative sum or integral of error signals and an estimated complex-valued transfer function of the scaling circuit. Methods of quick calibration of the reader are described, including accounting for circuit offsets and determining the estimated complex-valued transfer function. | 12-04-2014 |
20140364072 | Multi-Band Multi-Path Receiving and Transmitting Device and Method, and Base Station System - A multi-band multi-path receiving and transmitting device and method are provided. The multi-band multi-path receiving and transmitting device includes at least two multi-frequency couplers, a multi-band transceiver, and a signal processing module. The multi-band transceiver includes at least two first frequency band receiving branches and at least two second frequency band receiving branches, and the multi-band transceiver is adopted to decrease the number of the transceivers, thereby reducing the material cost and the mounting cost of the base station system. | 12-11-2014 |
20150031316 | MONITORING NON-SUPPORTED WIRELESS SPECTRUM WITHIN COVERAGE AREAS OF DISTRIBUTED ANTENNA SYSTEMS (DASs) - Monitoring non-supported wireless spectrum within a coverage area of a distributed antenna system (DAS) in which a listening module connected to a remote unit of the DAS monitors non-supported wireless frequencies (i.e., frequencies that are outside the frequency ranges supported by the downlink and uplink signals of the DAS), via one or more antennas. The listening module also transmits the wireless frequencies to a monitoring module connected to head end equipment (HEE) of the DAS. In that manner, a monitoring module can use an existing DAS infrastructure to monitor non-supported portions of the wireless spectrum at remote locations. In addition to avoiding the need to run a parallel DAS infrastructure, the disclosed arrangements are also useful in shared spectrum environments and other environments where efficient spectrum utilization is desired. | 01-29-2015 |
20150056934 | Multi-Mode Crystal Oscillators - Digital control of a crystal oscillator is implemented in a manner that allows frequency accuracy to be traded off dynamically with power consumption. The oscillator transitions between a less accurate/lower power mode and a high accuracy/higher power mode smoothly without requiring any external clock source during the transition. Power consumption is optimized because the crystal oscillator provides the clock source during transitions between the power modes and no other clock source is needed for these transitions. The system can also optimize the startup time and steady state power consumption independently. | 02-26-2015 |
20150087248 | FULLY INTEGRATED MILLIMETER-WAVE RADIO FREQUENCY SYSTEM - Aspects of the present disclosure provide a radio frequency (RF) system that may be implemented in a variety of devices. For example, the RF system may include a plurality of first RF-modules, each configured to process RF signals received from a corresponding antenna array to generate intermediate frequency (IF) signals and to process IF signals for transmission via the antenna array, wherein the plurality of first RF modules are coupled to each other via a first interface comprising transmission lines for carrying at least an IF signal, a local oscillator (LO) signal, and a control signals; at least one second RF module; and a baseband module configured to provide IF signals, the LO signal, and the control signals to one of the first RF modules via a second interface and to provide at least IF signals to the second RF module via a third interface. | 03-26-2015 |
20150303972 | CASCADING RADIO FREQUENCY CIRCUITS - Cellular processors are cascaded to provide different configurations, which result in higher-capacity base stations, increased numbers of simultaneous users over one frequency band, and/or aggregation of several carriers while still using only one radiofrequency (RF) chipset. The processors are aligned in both time and frequency, with each processor having a data port that allows data exchange with the other processors. The data alignment and exchange allow the processors, in the aggregate, to act as a single unit, resulting in a scalable architecture that can accommodate different system configurations. | 10-22-2015 |
20150333850 | METHOD AND APPARATUS FOR CALIBRATING DISTORTION OF SIGNALS - An electronic device for and method of determining a calibration code is provided. The electronic device includes a modem configured to receive a transmission signal, determine a calibration code that minimizes distortion of the transmission signal, and calibrate the distortion of the transmission signal using the calibration code. | 11-19-2015 |
20150341075 | AMPLIFIER UTILIZING A CONFIGURABLE INTERFACE TO A FRONT END MODULE - A system and method adapts to interfaces utilized in a radio frequency transceiver. The system and method be utilized by an amplifier. The amplifier can include an input stage configurable to one of a plurality of external interfaces. The external interfaces can include a DC feed external interface or a DC decoupling external interface. The amplifier can include an amplification circuit configured to receive a signal at the input stage and amplify the signal. The external interfaces can be associated with a front end module. | 11-26-2015 |
20150349737 | INPUT CURRENT LIMITED POWER SUPPLY AND AUDIO POWER AMPLIFIER FOR HIGH POWER REPRODUCTION OF NONDETERMINISTIC SIGNALS - A method and apparatus for amplifying audio signals without exceeding an input current limit budgeted for the audio power amplifier circuit includes an intermediate energy storage between a battery and the audio power amplifier which provides an energy reserve to support amplifying peaks where the peaks have a peak power that is greater than the power that can be drawn from the battery due to the input current limit. Speech signals, which include substantial periodic content having short peaks relative to a pitch period, can be amplified without depleting the intermediate energy storage, allowing the intermediate energy storage to recover after a peak and before occurrence of a next peak. When an audio signal is amplified that results in depletion of the intermediate energy storage, a depletion recovery circuit reduces the overall audio gain to reduce the power demand of the audio power amplifier so as to substantially avoid distortion. | 12-03-2015 |
20150349808 | Multi-Band Multi-Path Receiving and Transmitting Device and Method, and Base Station System - A multi-band multi-path receiving and transmitting device and method, and a base station system are provided. The multi-band multi-path receiving and transmitting device includes a broadband antenna, at least two multi-frequency couplers, a multi-band transceiver, and a signal processing module. The multi-band transceiver is adopted to decrease the number of the transceivers, thereby reducing the material cost and the mounting cost of the base station system. | 12-03-2015 |
20160204819 | SIGNAL TRANSCEIVER CIRCUIT | 07-14-2016 |
20170237448 | METHOD FOR PERFORMING COMMUNICATION AND ELECTRONIC DEVICE SUPPORTING SAME | 08-17-2017 |
455085000 | Transmitter oscillator used as detector | 2 |
20110183635 | Contactless integrated circuit card with real-time protocol switching function and card system including the same - A contactless integrated circuit (IC) card can include: an analog interface block operable to demodulate a received radio frequency (RF) signal into multiple versions thereof according to a first plurality of communication protocols, respectively; a controller operable to select from among a second plurality of communication protocols; and a universal asynchronous receiver/transmitter (UART) operable to select one of the demodulated versions of the RF signal according to the selected protocol. | 07-28-2011 |
20130012144 | WIRELESS COMMUNICATION DEVICE UTILIZING RADIATION-PATTERN AND/OR POLARIZATION CODED MODULATION - A wireless communication device includes a processing module, receiver sections, transmitter sections, and an antenna assembly. The processing module is operable to convert outbound data into a transmit radiation pattern in accordance with a multiple antenna constellation mapping protocol and to generate outbound symbol streams based on the transmit radiation pattern. The transmitter sections convert the outbound symbol streams into outbound wireless signals. The antenna assembly transmits the outbound wireless signals in accordance with the transmit radiation pattern. The antenna assembly also receives inbound wireless signals, which have a receive radiation pattern. The receiver sections convert the inbound wireless signals into inbound symbol streams. The processing module converts the inbound symbol streams into the receive radiation pattern in accordance with the multiple antenna constellation mapping protocol and converts the receive radiation pattern into inbound data in accordance with the multiple antenna constellation mapping protocol. | 01-10-2013 |
455086000 | Transmitter oscillator used as local oscillator | 12 |
20080242240 | Calibration of wireless communication device - A wireless communication device includes an integrated circuit (IC) and an antenna system. The IC includes a baseband processing module, a network processing module, a calibration processing module, a receiver section and a transmitter section. The network processing module establishes a wireless communication protocol and operational parameters based on the wireless communication protocol. The calibration processing module generates RF receiver calibration information based on the operational parameters and RF receive feedback and generates RF transmitter calibration information based on the operational parameters and RF transmit feedback. The receiver section provides the RF receive feedback and converts an inbound RF signal into an inbound symbol stream. The transmitter section provides the RF transmit feedback and converts an outbound symbol stream into an outbound RF signal. The antenna system provides the inbound RF signal to the receiver section and receives the outbound RF signal from the transmitter section. | 10-02-2008 |
20090098835 | RADIO-FREQUENCY SIGNAL RECEPTION AND/OR TRANSMISSION DEVICE WITH NOISE REDUCTION - The radio-frequency signal reception and/or transmission device includes an antenna ( | 04-16-2009 |
20090170448 | MASTER-SLAVE LOCAL OSCILLATOR PORTING BETWEEN RADIO INTEGRATED CIRCUITS - A technique to share a local oscillator signal between two radio frequency integrated circuits (RFICs). The local oscillator signal generated internally by one RFIC is ported to the other RFIC for use in transmit or receive operation. The local oscillator signal that is ported may be an RF local oscillator signal. Each RFIC may include a bi-directional port circuit that can be operated to make the RFIC a master, slave or may be totally disabled to disable the porting feature. This is particularly useful in RFICs that are used to communicate using MIMO radio algorithms which rely for optimum performance on phase and frequency coherency among a plurality of transmitters and a plurality of receivers. | 07-02-2009 |
20100203848 | FIXED BANDWIDTH LO-GEN - A local oscillation generator (LO-GEN) maintains a fixed bandwidth using a voltage controlled oscillator (VCO) calibration module and gain calibration module that together compensate for variations in the VCO gain based on the oscillation frequency. During an open loop calibration of the LO-GEN, the VCO calibration module programs the VCO gain to an initial coarse value based on the oscillation frequency and then the gain calibration module adjusts the charge pump current to compensate for VCO gain changes. | 08-12-2010 |
20100279631 | BIDIRECTIONAL FREQUENCY CONVERTER AND RADIO EQUIPMENT USING SAME - When a power supply switch is turned on and an RF signal and an LO signal are input to a bipolar transistor, a mixed signal of both signals is output as an IF signal. When the power supply switch is turned off, the bipolar transistor operates as two diodes connected between a base terminal and an emitter terminal and between the base terminal and a collector terminal. When the IF signal and the LO signal are input, the input signals are mixed with each other by the diodes and the RF signal is output. Accordingly, one frequency conversion is performed by the use of one frequency converter, an external circuit such as a signal path switching switch is not necessary. | 11-04-2010 |
20110014880 | SYSTEM AND METHOD FOR A SINGLE CHIP DIRECT CONVERSION TRANSCEIVER IN SILICON - A direct conversion radio frequency (RF) transceiver integrated circuit (IC) is provided. The IC includes a local oscillator block, a receiver block, and a transmitter block disposed on a single silicon-based integrated circuit. Each of such blocks are connected to a ground plane that includes a metal located adjacent to each of such blocks, air gaps located between each section of the metal adjacent to such blocks, each section of the metal being connected to the adjacent section of metal in the group plane at a location on the edge of the ground plan corresponding to a point substantially equidistant from the two sections of metal. A system and method is provided for implementing a direct conversion integrated circuit architecture. A clock distribution system is provided, as well as a method for radio detection and ranging (RADAR) using a Doppler RADAR transceiver system in the W-band. A method for noise isolation between blocks of an integrated circuit is also provided. | 01-20-2011 |
20110105054 | MASTER-SLAVE LOCAL OSCILLATOR PORTING BETWEEN RADIO INTEGRATED CIRCUITS - A technique to share a local oscillator signal between two radio frequency integrated circuits (RFICs). The local oscillator signal generated internally by one RFIC is ported to the other RFIC for use in transmit or receive operation. The local oscillator signal that is ported may be an RF local oscillator signal. Each RFIC may include a bi-directional port circuit that can be operated to make the RFIC a master, slave or may be totally disabled to disable the porting feature. This is particularly useful in RFICs that are used to communicate using MIMO radio algorithms which rely for optimum performance on phase and frequency coherency among a plurality of transmitters and a plurality of receivers. | 05-05-2011 |
20110306311 | Adaptively powered local oscillator generator circuit and related method - According to one embodiment, a radio frequency (RF) transceiver includes a local oscillator generator (LOGEN) circuit configured to receive an adaptive supply voltage. The LOGEN circuit is coupled to a variable power supply for providing the adaptive supply voltage. A process monitor for the LOGEN circuit is in communication with the variable power supply through a power supply programming module. As a result, the adaptive supply voltage can be adjusted according to data supplied by the process monitor. A method for adaptively powering a LOGEN circuit comprises providing power to an RF device, monitoring a process corner of said LOGEN circuit, determining a supply voltage corresponding to the process corner, and adjusting the supply voltage to adaptively power the LOGEN circuit. | 12-15-2011 |
20120040628 | Transceiver with Interferer Control - Some embodiments of the present disclosure relate to a transceiver that includes multiple communication subunits associated with multiple communication protocols, respectively. The transceiver includes a conflict detection and control unit that determines whether interference is present or anticipated to occur between two or more of the communication subunits. If interference is present or anticipated, a local oscillator (LO) tuning unit changes an LO frequency provided to at least one of the two or more communication units. For example, in some embodiments, the LO tuning unit changes the LO frequency from high-side injection to low-side injection, or vice versa, or changes the intermediate frequency (IF) associated with a given communication subunit. In these ways, the techniques disclosed herein limit signal degradation due to interference from communication subunits residing within the transceiver. | 02-16-2012 |
20140065985 | TRANSCEIVER WITH SUPER-HETERODYNE AND ZERO INTERMEDIATE FREQUENCY (ZIF) TOPOLOGIES - Transceivers implemented with a combination of super-heterodyne and zero intermediate frequency (ZIF) topologies are disclosed. In an exemplary design, an apparatus includes a frequency conversion circuit and a local oscillator (LO) generator. The LO generator generates a first LO signal and a second LO signal. The frequency conversion circuit performs frequency conversion (i) between intermediate frequency (IF) and baseband, based on the first LO signal, for an IF signal and (ii) between radio frequency (RF) and baseband, based on the second LO signal, for an RF signal. The frequency conversion circuit may perform frequency downconversion (i) from IF to baseband for a super-heterodyne receiver and (ii) from RF to baseband for a ZIF receiver. Alternatively or additionally, the frequency conversion circuit may perform frequency upconversion (i) from baseband to IF for a super-heterodyne transmitter and (ii) from baseband to RF for a ZIF transmitter. | 03-06-2014 |
20140287700 | RADIO COMMUNICATION DEVICE, TRANSMISSION CIRCUIT AND BUFFER CIRCUIT - According to one embodiment, a buffer circuit has a capacitor comprising a first terminal and a second terminal, an input signal being inputted to the first terminal, a first inverting amplifier circuit configured to invert and amplify a signal of the second terminal of the capacitor, a second inverting amplifier circuit configure to invert and amplify an output signal of the first inverting amplifier circuit, and a MOS (Metal Oxide Semiconductor) transistor comprising a third terminal, a fourth terminal and a gate, the third terminal being connected to the second terminal of the capacitor, the fourth terminal being connected to a connection node of the first and the second inverting amplifier circuits, an inversion signal of the input signal being inputted to the gate. | 09-25-2014 |
455087000 | Tunable or variable | 1 |
20150341126 | METHOD AND DEVICE FOR SUPPRESSING HARMONIC SIGNALS - A method for suppressing harmonic signals includes: mixing a first local oscillation signal with an input signal to obtain a first output signal, and mixing a second local oscillation signal with the input signal to obtain a second output signal, the first output signal including an n-order harmonic signal, n being a positive integer greater than 1; and adding the first output signal and the second output signal to suppress the n-order harmonic signal in the first output signal. The first local oscillation signal and the second local oscillation signal have different mark-space ratios but a same oscillation frequency. | 11-26-2015 |