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Class Information
Number: 375/297
Name: Pulse or digital communications > Transmitters > Antinoise or distortion (includes predistortion) > Power amplifier
Description: Subject matter including an amplifier which is used for the modulation process in the transmitter.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6462617 Method and apparatus for calculating the predistortion function from a power amplifier model Oct. 8, 2002
6452447 Adaptive distortion-compensation apparatus Sep. 17, 2002
6445729 Radio signal transceiver apparatus Sep. 3, 2002
6434135 Adaptive RF amplifier prelimiter Aug. 13, 2002
6434187 Digital radiofrequency transceiver Aug. 13, 2002
6434202 Method and apparatus for forming pulse shaped signals Aug. 13, 2002
6429736 On-line calibration of linear amplifiers Aug. 6, 2002
6430169 Spectral shaping a CDMA signal Aug. 6, 2002
6424681 Peak to average power ratio reduction Jul. 23, 2002
6421533 Method and apparatus for controlling the envelope of a radio signal Jul. 16, 2002
6418173 Transmission Apparatus Jul. 9, 2002
6411655 Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal Jun. 25, 2002
6407634 Linear envelope tracking RF power amplifier with adaptive analog signal processing Jun. 18, 2002
6404823 Envelope feedforward technique with power control for efficient linear RF power amplification Jun. 11, 2002
6404824 Apparatus and method to reduce power amplifier noise generation in a multiplexed communication system Jun. 11, 2002
6400415 System and method for predistorting signals to be amplified Jun. 4, 2002
6396879 Transmission power controller and transmission power control method May. 28, 2002
6384681 Swept performance monitor for measuring and correcting RF power amplifier distortion May. 7, 2002
6385436 Distortion compensation circuit May. 7, 2002
6381212 Power sharing amplifier system for amplifying multiple input signals with shared power amplifiers Apr. 30, 2002
6377630 Transmission circuit Apr. 23, 2002
6377786 System and method for gain control of individual narrowband channels using a wideband power measurement Apr. 23, 2002
6370109 CDMA signal power control using quadrature signal calculations Apr. 9, 2002
6370187 Adaptive power dissipation for data communications system Apr. 9, 2002
6370203 Power control for wireless communications system Apr. 9, 2002
6356742 Adaptive precorrection of signal combiners using passive hybrid junction sample cancellation Mar. 12, 2002
6349216 Load envelope following amplifier system Feb. 19, 2002
6337599 Predistortion linearizer for power amplifier Jan. 8, 2002
6335767 Broadcast transmission system with distributed correction Jan. 1, 2002
6330289 System for improving base station amplifier performance Dec. 11, 2001
6326843 Analog reflective predistorter for power amplifiers Dec. 4, 2001
6324383 Radio transmitter distortion reducing techniques Nov. 27, 2001
6320463 Adaptive digital pre-correction of nonlinearities introduced by power amplifiers Nov. 20, 2001
6320913 Circuit and method for controlling transmission amplifiers Nov. 20, 2001
6313738 Adaptive noise cancellation system Nov. 6, 2001
6307894 Power amplification using a direct-upconverting quadrature mixer topology Oct. 23, 2001
6304140 Digital predistortion for amplifiers Oct. 16, 2001
6298097 Amplifier with wideband digital predistortion Oct. 2, 2001
6292055 Electronic apparatus comprising a power amplifier Sep. 18, 2001
6286994 System, method and computer program product for controlling a transmit signal using an expected power level Sep. 11, 2001
6288610 Method and apparatus for correcting signals, apparatus for compensating for distortion, apparatus for preparing distortion compensating data, and transmitter Sep. 11, 2001
6285255 Adaptive compensation for carrier signal phase distortion Sep. 4, 2001
6285412 Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system Sep. 4, 2001
6281935 System and method for controlling a transmitter frequency Aug. 28, 2001
6281936 Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components Aug. 28, 2001
6282247 Method and apparatus for digital compensation of radio distortion over a wide range of temperatures Aug. 28, 2001
6272326 Distortion compensation address generator, distortion compensating circuit, and transmitter Aug. 7, 2001
6266517 Method and apparatus for correcting distortion in a transmitter Jul. 24, 2001
6262631 Silicon power bipolar junction transistor with an integrated linearizer Jul. 17, 2001
6252912 Adaptive predistortion system Jun. 26, 2001

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