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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620373 |
Apparatus and method for calibration of gain and/or phase imbalance and/or DC offset in a communication system |
Nov. 17, 2009 |
| 7616711 |
Frequency domain filtering to improve channel estimation in multicarrier systems |
Nov. 10, 2009 |
| 7616678 |
Multi-carrier constant envelope signal scheme for power and bandwidth efficient communications |
Nov. 10, 2009 |
| 7613433 |
Reducing local oscillation leakage in a radio frequency transmitter |
Nov. 3, 2009 |
| 7613251 |
Distortion compensating apparatus and method |
Nov. 3, 2009 |
| 7613250 |
Distortion compensation apparatus |
Nov. 3, 2009 |
| 7613249 |
Spurious component reduction |
Nov. 3, 2009 |
| 7613248 |
Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems |
Nov. 3, 2009 |
| 7613239 |
Digital signal offset adjusting apparatus and pulse pattern generator using the same |
Nov. 3, 2009 |
| 7606539 |
Adaptive predistorter coupled to a nonlinear element |
Oct. 20, 2009 |
| 7606324 |
Digital pre-distortion technique using non-linear filters |
Oct. 20, 2009 |
| 7606323 |
Carrier leak reduction transmitter circuit |
Oct. 20, 2009 |
| 7606322 |
Digital pre-distortion technique using nonlinear filters |
Oct. 20, 2009 |
| 7606321 |
System and method for simplifying analog processing in a transmitter incorporating a randomization circuit |
Oct. 20, 2009 |
| 7606317 |
Channel optimization system |
Oct. 20, 2009 |
| 7603089 |
Methods and apparatus for conditioning low-magnitude events in communications signals |
Oct. 13, 2009 |
| 7602858 |
Digital transmitter |
Oct. 13, 2009 |
| 7599445 |
Device for transmitting digital signals between mobile units with modification of the spectral characteristics |
Oct. 6, 2009 |
| 7599418 |
Method and apparatus for a frequency hopper |
Oct. 6, 2009 |
| 7596184 |
Apparatus, system, and method for amplitude-phase synchronization in polar transmitter |
Sep. 29, 2009 |
| 7593699 |
Distortion/efficiency adaptation in a variable-data-rate radio transmitter |
Sep. 22, 2009 |
| 7593486 |
Apparatus and method for controlling transmission mode in a MIMO mobile communication system |
Sep. 22, 2009 |
| 7593484 |
Radio frequency (RF) receiver with double loop integrated fast response automatic gain control (AGC) |
Sep. 22, 2009 |
| 7593479 |
Precoding for a non-linear codec |
Sep. 22, 2009 |
| 7593478 |
Low peak to average ratio search algorithm |
Sep. 22, 2009 |
| 7593477 |
Training sequence for linearizing an RF amplifier |
Sep. 22, 2009 |
| 7593357 |
Transmit processing using receiver functions |
Sep. 22, 2009 |
| 7590190 |
System and method for forward path gain control in a digital predistortion linearized transmitter |
Sep. 15, 2009 |
| 7586996 |
Method for controlling the power of the output signal from an amplifier system and the associated system |
Sep. 8, 2009 |
| 7586995 |
Peak windowing for crest factor reduction |
Sep. 8, 2009 |
| 7586987 |
High speed data link with transmitter equalization and receiver equalization |
Sep. 8, 2009 |
| 7583754 |
Method and system for broadband predistortion linearization |
Sep. 1, 2009 |
| 7583753 |
Methods and transmitters for loop-back adaptive pre-emphasis data transmission |
Sep. 1, 2009 |
| 7583738 |
Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system |
Sep. 1, 2009 |
| 7583736 |
Radio transmission device, radio reception device, and method for selecting transmission cancellation subcarriers |
Sep. 1, 2009 |
| 7583725 |
Dynamically reconfigurable adaptive communication device and system |
Sep. 1, 2009 |
| 7580686 |
Adaptive predistortion method and arrangement |
Aug. 25, 2009 |
| 7577211 |
Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects |
Aug. 18, 2009 |
| 7573959 |
Method and apparatus for removing impulse noise |
Aug. 11, 2009 |
| 7573947 |
Simplified narrowband excision |
Aug. 11, 2009 |
| 7570710 |
In-phase and quadrature-phase signal amplitude and phase calibration |
Aug. 4, 2009 |
| 7570708 |
Serdes auto calibration and load balancing |
Aug. 4, 2009 |
| 7570707 |
Digital delay element for delay mismatch cancellation in wireless polar transmitters |
Aug. 4, 2009 |
| 7570127 |
Method and system for spur suppression in modulators |
Aug. 4, 2009 |
| 7567666 |
Method and apparatus for crosstalk mitigation |
Jul. 28, 2009 |
| 7567625 |
Apparatus and method for sub-carrier allocation in a multiple-input and multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system |
Jul. 28, 2009 |
| 7567623 |
Differential space-time block coding apparatus with high transmission rate and method thereof |
Jul. 28, 2009 |
| 7564922 |
RF transmitter for efficiently compensating output power variation due to temperature and process |
Jul. 21, 2009 |
| 7564921 |
DC offset correction apparatus and method |
Jul. 21, 2009 |
| 7564920 |
Digital transmitter |
Jul. 21, 2009 |
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