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| Application No. | Application Title | Issue Date |
| 20120083229 | RADIO TRANSMITTER AND METHOD FOR TRANSMISSION OF COMBINED SIGNAL A radio transmitter is disclosed which comprises at least two transmit paths. A combiner is connected to the at least two transmit paths for combining modified transmit signals on the at least two transmit paths to form a combined signal. The radio transmitter further c... | 04/05/2012 |
| 20120028591 | APPARATUS AND METHOD FOR LOW VOLTAGE RADIO TRANSMISSION Apparatus and methods are disclosed related to low-voltage radio transmitters with high spectral purity. One such apparatus includes a baseband path with a predistortion stage, a programmable filter, and an upconverter core. In an embodiment, the programmable filter is ... | 02/02/2012 |
| 20120002752 | PREDISTORTION OF COMPLEX MODULATED WAVEFORM Exemplary embodiments of the invention include a transmitter system configured to predistort an input signal to generate a target output signal. An exemplary transmitter system includes a forward path including a predistortion device coupled with an amplifier, the forwa... | 01/05/2012 |
| 20110312290 | Method and System for Closed Loop Pre-Distortion for PSK/QAM Modulation Using Feedback from Distant End of a Link A method of signal distortion correction in a telecommunications channel, the method comprising modeling predicted signal distortion of an electromagnetic (EM) signal using one or more non-linearity model parameters of a signal distortion model, calculating and transfer... | 12/22/2011 |
| 20110261903 | WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUIT AND METHOD OF POWER CONTROL OF A POWER AMPLIFIER THEREFOR A wireless communication unit comprises a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the power amplifier, wherein the feedback path comprises a coupler arranged to feed back a portion of a signal to be tra... | 10/27/2011 |
| 20110195678 | System and Method for Transceivers in a Wireless Network In accordance with an embodiment, a method of operating a multi-output wireless transmitter includes determining a precoded data stream based on input data, where the determining includes determining a signal to interference plus noise ratio (SINR) of a plurality of rec... | 08/11/2011 |
| 20110151778 | RANGING UP-SIGNAL PRE-DISTORTION SYSTEM AND METHOD Provided is a ranging up-signal pre-distortion system and method. The ranging-up signal pre-distortion system may include a channel gain estimator to estimate a channel gain based on a down-signal, and a signal distortion unit to distort a ranging up-signal based on the... | 06/23/2011 |
| 20110143697 | SEPARATE I AND Q BASEBAND PREDISTORTION IN DIRECT CONVERSION TRANSMITTERS In-Phase (I) and Quadrature (Q) signals passing from a modem into a direct conversion transmitter are predistorted separately from, and independently of, one another. The I signal is predistorted to compensate for nonlinearities in the baseband I path circuitry between ... | 06/16/2011 |
| 20110110453 | SYSTEMS AND METHODS FOR PRIORITIZING BEAMS TO ENABLE EFFICIENT DETERMINATION OF SUITABLE COMMUNICATION LINKS Methods and systems for enabling the rectification of deteriorated channel conditions on a communication link are described. In particular, the methods and systems can employ mechanisms that prioritize beams in accordance with signal quality measures, direction of depar... | 05/12/2011 |
| 20110098011 | MULTIMODE POWER AMPLIFIER WITH PREDISTORTION A device may include an envelope detector to generate an envelope signal from the input signal, a drain bias controller to adjust a drain bias of the amplifier based on the envelope signal, a gate bias controller to adjust a gate bias of the amplifier based on the envel... | 04/28/2011 |
| 20110070846 | RADIO FREQUENCY-BASED COMMUNICATION TERMINAL HAVING TWO EXCHANGEABLE TRANSMITTING PATHS A radio frequency (RF)-based communication terminal includes a first switching chip, a second switching chip, a comparison module, a low noise amplifier (LNA), a first filter, a power amplifier (PA), a second filter, and a control module. The comparison module compares ... | 03/24/2011 |
| 20110059705 | ROBUST LINEAR PRECODER DESIGNS FOR MULTI-CELL DOWNLINK TRANSMISSION Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a worst-case sum rate are described for both full base station cooperation and... | 03/10/2011 |
| 20110045787 | Calibration-Less Transmit Beamforming A calibration-less transmit beamforming apparatus and method are provided. In a wireless communication device that comprises a plurality of antennas, a gain block is provided in the front-end module associated with each antenna and the same gain block is used during tra... | 02/24/2011 |
| 20110034136 | CANCELLATION OF OSCILLATOR REMODULATION A wireless transmitter (100) comprises a signal generator (10) for generating a signal, an amplifier (50) for amplifying the signal, and a phase shifting circuit (20) coupled between the signal generator (10) and the amplifier (50 | 02/10/2011 |
| 20100323641 | METHOD AND APPARATUS FOR USING PRE-DISTORTION AND FEEDBACK TO MITIGATE NONLINEARITY OF CIRCUITS Techniques for mitigating nonlinearity of circuits with both pre-distortion and feedback are described. An apparatus may include at least one circuit (e.g., an upconverter, a power amplifier, etc.), a pre-distortion circuit, and a feedback circuit. The circuit(s) may ge... | 12/23/2010 |
| 20100311361 | SIGNAL TRANSMITTER LINEARIZATION A linearizer for a non-linear transmitter includes a tap delay line that provides samples of an input signal at selected times. At least one Volterra tap is coupled to the tape delay line. The Volterra tap includes a lookup table representation of a polynomial. An adapt... | 12/09/2010 |
| 20100311351 | TRANSMITTING DEVICE AND METHOD FOR DETERMINING TARGET PREDISTORTION SETTING VALUE The present invention provides a transmitting device and a method for determining a target predistortion setting value. The transmitting device comprises: a setting value control unit, a predistortion unit, a transmitting circuit, a receiving circuit, and a determining ... | 12/09/2010 |
| 20100311360 | TRANSMITTER, METHOD FOR LOWERING SIGNAL DISTORTION, AND METHOD FOR GENERATING PREDISTORTION PARAMETERS UTILIZED TO LOWER SIGNAL DISTORTION A transmitter includes a predistortion calculation unit, a transmitting circuit, a receiving circuit, an adjusting unit and a parameter generating and storing unit. The predistortion calculation unit is utilized for pre-distorting an input signal to generate a predistor... | 12/09/2010 |
| 20100304694 | WIRELESS COMMUNICATION APPARATUS A wireless communication apparatus configured to amplify a transmission signal at an amplifier and transmit the amplified transmission signal, the wireless communication apparatus includes a memory configured to store a distortion compensation coefficient for compensati... | 12/02/2010 |
| 20100297966 | Measuring and Correcting Errors in a Transmit Chain with an IQ Up-Converter and IQ Down-Converter A transmit chain comprises a transmit path with a quadrature up-converter which up-converts quadrature signal components to RF. An observation path samples a portion of the RF signal and a quadrature down-converter down-converts the RF signal to baseband quadrature sign... | 11/25/2010 |
| 20100255797 | METHOD FOR TRANSMISSION INTERFERANCE CANCELLATION FOR MU-MIMO The present invention relates to a transmission interference cancellation method for a multiuser MIMO system. The method includes decomposing a channel matrix to represent formulae of permutation matrixes including a first matrix and a second matrix; determining an opti... | 10/07/2010 |
| 20100248658 | METHOD AND SYSTEM OF ADAPTIVE PREDISTORTION OF A WIRELESS TRANSMITTER A method of adaptive predistortion of a power amplifier, characterised in that the method comprises the steps of: storing values of a plurality of corresponding first and second coefficients; selecting one of the stored first coefficients; processing a first signal with... | 09/30/2010 |
| 20100240329 | AMPLIFYING DEVICE AND TRANSMITTER APPARATUS An amplifying device includes an amplifier including a first amplifying element with a drain voltage thereof being controlled, and a second amplifying element, the amplifier amplifying a transmission signal with the first and second amplifying elements, synthesizing the... | 09/23/2010 |
| 20100233974 | Feedback Compensation Detector For A Direct Conversion Transmitter A feedback compensation detector for a direct conversion transmitter includes a baseband processor, a direct up-converter, an antenna, and an impairment detection and compensation feedback circuit. The baseband processor generates an in-phase (I) baseband signal and a q... | 09/16/2010 |
| 20100167798 | RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD A radio transmission apparatus according to the present invention detects an output current of a power supply section that varies in response to a variation of the output impedance of an amplification section, and corrects a distortion of the input/output characteristic... | 07/01/2010 |
| 20100159855 | TECHNIQUES FOR PRE-DISTORTING TRANSMITTED SIGNALS FOR A TRANSMITTER DEVICE Techniques for sending and receiving signals include pre-distorting signals before transmission across a communication path. The signals are pre-distorted as a function of a distortion on the communication path. In one embodiments, transmitter a broadcasts to receiver b... | 06/24/2010 |
| 20100159856 | Distortion compensator, distortion compensation method, and transmitter A distortion compensator for reducing a level of a distortion component included in an output analog signal of an amplifier, includes: an A/D converter to convert the output analog signal of the amplifier into a digital output signal; a comparator to generate a distorti... | 06/24/2010 |
| 20100130145 | AMPLIFICATION SYSTEM FOR INTERFERENCE SUPPRESSION IN WIRELESS COMMUNICATIONS An amplification system including a high gain amplifier, filter module and low gain amplifier. The high gain amplifier for receiving an input RF signal and processing the input RF signal to produce a first amplified signal while the high gain amplifier is operating near... | 05/27/2010 |
| 20100111222 | Digital Modulation Jitter Compensation for Polar Transmitter This disclosure relates to clock jitter suppression in digital to analog converter generated pulses for a polar transmitter.... | 05/06/2010 |
| 20100104043 | POWER AMPLIFIER A switched mode class-S power amplifier comprises a sigma-delta modulator with a digital input, a power switch connected to the output of the sigma-delta modulator providing the power amplifier output, and a feedback mechanism. The sigma-delta modulator has a high-pass ... | 04/29/2010 |
| 20100105342 | ELECTRONIC DEVICE WITH A DISTORTION CORRECTION CIRCUIT FOR A POWER AMPLIFIER, AND ASSOCIATED METHODS An electronic device includes a radio frequency (RF) modulator, a power amplifier, and a distortion correction circuit coupled between the RF modulator and the power amplifier. The distortion correction circuit includes a variable gain amplifier coupled between the RF m... | 04/29/2010 |
| 20100104042 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD There is provided a communication system capable of achieving a high usage efficiency of frequencies without the need for cooperation of multiplexed users. A communication system communicates over frequency channels set by dividing a frequency bandwidth assigned to the ... | 04/29/2010 |
| 20100081399 | PRECODING FOR MULTIPLE ANNTENNAS A wireless network (20) participates in radio frequency communication with plural wireless terminals (30). The network (20) comprises plural transmitters (40); a precoder value processor (42) configured to develop a set of precoder val... | 04/01/2010 |
| 20100069023 | METHOD AND APPARATUS FOR PREDISTORTING A WAVEFORM FOR INPUT TO AN AMPLIFIER A method of predistorting a waveform for input to an amplifier includes receiving information associated with the waveform, the information comprising a modulation configuration of the waveform. The method further includes predicting a chain model for the waveform based... | 03/18/2010 |
| 20100062733 | DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD A distortion correction control apparatus is for compensating for a burst distortion of a transmission amplifier caused by a burst of an input signal of a transmission target. The apparatus includes a generation unit that generates a distortion correction coefficient ha... | 03/11/2010 |
| 20100056082 | COMMUNICATION SYSTEM WITH FREQUENCY-ADAPTIVE PREDISTORTER DESIGN A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal according to an input-output characteristic to generate an output signal, ... | 03/04/2010 |
| 20100048149 | Techniques for Adaptive Predistortion Direct Current Offset Correction in a Transmitter A technique for performing adaptive predistortion in a transmitter includes receiving, at a first input of an error signal unit, a delayed version of a baseband input signal. The technique also includes receiving, at a second input of the error signal unit, a power ampl... | 02/25/2010 |
| 20100048150 | APPARATUS AND METHOD FOR FEEDFORWARD-TYPE PHASE NOISE ELIMINATION IN PORTABLE TERMINAL The present invention relates to an apparatus and method for feedforward-type phase noise elimination in a portable terminal, which detect and eliminate phase-reversed phase noise by subtracting a GSM transmission signal, passed through the power amplifier of a GSM tran... | 02/25/2010 |
| 20100041352 | RADIO TRANSMITTER FRONT-END WITH AMPLITUDE AND PHASE CORRECTION AND METHODS FOR USE THEREWITH A radio transmitter front-end for use in a voice data and RF integrated circuit (IC) includes a phase correction module that produces a phase adjusted signal in response to a phase modulated signal and at least one phase correction signal. An amplitude correction module... | 02/18/2010 |
| 20100022208 | APPARATUS AND METHOD FOR CALIBRATION OF GAIN AND/OR PHASE IMBALANCE AND/OR DC OFFSET IN A COMMUNICATION SYSTEM An example of a radio frequency (RF) transmitter system for communication may include a transmit pre-distortion module configured to provide a second transmit calibration signal during a transmit calibration mode based on a first transmit calibration signal and one or m... | 01/28/2010 |
