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Class Information
Number: 375/296
Name: Pulse or digital communications > Transmitters > Antinoise or distortion (includes predistortion)
Description: Systems where any undesired modulation components accompanying a desired modulated carrier wave signal, which components are due to electrical disturbances within the useful frequency band or any undesired carrier wave distortion and which may originate at a source external to the transmitter or which may be generated internally in the transmitter, are reduced, eliminated or compensated for, or where the transmitted signal may, prior to transmission, be distorted in a manner complementary to the distortion introduced in the transmission medium.










Sub-classes under this class:

Class Number Class Name Patents
375/297 Power amplifier 1,115


Patents under this class:
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Patent Number Title Of Patent Date Issued
7986738 Peak to average power ratio reduction apparatus and method for a wireless OFDM transmitter Jul. 26, 2011
7983623 System and apparatus for interference suppression using macrodiversity in mobile wireless networks Jul. 19, 2011
7983358 Composite crest factor reduction Jul. 19, 2011
7983355 System and method for RF signal combining and adaptive bit loading for data rate maximization in multi-antenna communication systems Jul. 19, 2011
7974593 Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system Jul. 5, 2011
7970360 Electronic device with a distortion correction circuit for a power amplifier, and associated methods Jun. 28, 2011
7966633 Method for receiving broadcasting signal and broadcasting receiver Jun. 21, 2011
7965988 Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system Jun. 21, 2011
7965790 Log-antilog circuit and method for producing an up-converted and amplified transmission signal Jun. 21, 2011
7961813 Multi-value modulation/demodulation method and multi-value modulation/demodulation device Jun. 14, 2011
7961778 Data-dependent jitter pre-emphasis for high-speed serial link transmitters Jun. 14, 2011
7957487 Spurious component reduction Jun. 7, 2011
7957479 Apparatus and method for supporting distortionless vector perturbation in multiple antenna system Jun. 7, 2011
7956667 Power supply voltage forming device and polar modulation transmission device Jun. 7, 2011
7953180 Transmission power control method and transmission apparatus May. 31, 2011
7953179 Peak suppressing OFDM transmitter May. 31, 2011
7953178 Apparatus and method for detecting signal in a broadband wireless access system May. 31, 2011
7949070 Method and apparatus for executing MIMO eigenmode transmission May. 24, 2011
7949069 Method, system and apparatus for applying hybrid ARQ to the control of transmit diversity May. 24, 2011
7948862 Crosstalk cancellation using sliding filters May. 24, 2011
7948310 System and a method for signal processing May. 24, 2011
7944993 Downstream broad beam diversity May. 17, 2011
7944991 Constrained clipping for peak-to-average power ratio (crest factor) reduction in multicarrier transmission systems May. 17, 2011
7944989 Quadrature modulation apparatus, method, program, and recording medium May. 17, 2011
7944980 Apparatus, and associated method, for communicating a data block in a multi carrier modulation communication scheme May. 17, 2011
7940857 Method for limiting signal and transmitter May. 10, 2011
7937041 Shared frequency transmitter May. 3, 2011
7936811 Modulation apparatus, modulation method, and demodulation apparatus May. 3, 2011
7933569 Timing adjustment method for wireless communication apparatus Apr. 26, 2011
7929639 Device for compensating radio frequency distortion in orthogonal frequency division multiplexing transmission system and method thereof Apr. 19, 2011
7929637 Method and apparatus for digital amplitude and phase modulation Apr. 19, 2011
7929636 Techniques for reducing precoding overhead in a multiple-input multiple-output wireless communication system Apr. 19, 2011
7928813 Transient noise control for digital RF modulation Apr. 19, 2011
7924942 Power amplifier pre-distortion Apr. 12, 2011
7924941 Digital pre-distortion for orthogonal frequency division multiplexing (OFDM) signals Apr. 12, 2011
7924907 Apparatus and method for spreading/de-spreading data using pair of child orthogonal variable spreading factor codes Apr. 12, 2011
7920644 Predistortion apparatus and predistortion method Apr. 5, 2011
7916781 Serial concatenation of interleaved convolutional codes forming turbo-like codes Mar. 29, 2011
7912160 Modulation circuit having DC offset level control circuit Mar. 22, 2011
7912156 Digital communications method and system for communicating over channels with block fading and burst jamming Mar. 22, 2011
7912148 Transmission circuit and communication device Mar. 22, 2011
7907916 Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system Mar. 15, 2011
7907678 Power series predistorter and control method thereof Mar. 15, 2011
7907659 Dual-band line interface circuit capable of multi-band communication Mar. 15, 2011
7907510 Interleaver, deinterleaver, communication device, and method for interleaving and deinterleaving Mar. 15, 2011
7907508 Graph-based method for allocating resources in OFDMA networks Mar. 15, 2011
7904034 Method and system for providing an interference cancellation in a wireless communication system Mar. 8, 2011
7903758 Digital television transmitting system and receiving system and method of processing broadcast data Mar. 8, 2011
7903537 Graph-based method for allocating resources in OFDMA networks Mar. 8, 2011
7899127 Method and device for reducing the crest factor of a signal Mar. 1, 2011

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