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Class Information
Number: 375/235
Name: Pulse or digital communications > Equalizers > Automatic > Adaptive > Quadrature channels
Description: Subject matter in which the received signal is processed to provide two components, one which differs in phase from the other by 90 degrees.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7599449 |
Hybrid modulus blind equalization for quadrature amplitude modulation (QAM) receivers |
Oct. 6, 2009 |
| 7596175 |
Methods and circuits for performing margining tests in the presence of a decision feedback equalizer |
Sep. 29, 2009 |
| 7593483 |
Nonlinear mapping in digital-to-analog and analog-to-digital converters |
Sep. 22, 2009 |
| 7590175 |
DFE margin test methods and circuits that decouple sample and feedback timing |
Sep. 15, 2009 |
| 7561103 |
Method and device for generating a constant envelope navigation signal with four independent codes |
Jul. 14, 2009 |
| 7555051 |
Method and device for estimating IQ imbalance |
Jun. 30, 2009 |
| 7542508 |
Continuous-time decision feedback equalizer |
Jun. 2, 2009 |
| 7542521 |
Direct-conversion frequency mixer |
Jun. 2, 2009 |
| 7532667 |
Pilot-directed and pilot/data-directed equalizers |
May. 12, 2009 |
| 7526019 |
Method and system for providing multi-channel multimode QAM equalization and carrier recovery |
Apr. 28, 2009 |
| 7526021 |
Telecommunications transmission systems |
Apr. 28, 2009 |
| 7515664 |
Method of recovering data in asynchronous applications |
Apr. 7, 2009 |
| 7509109 |
Adaptive correction of a received signal frequency response tilt |
Mar. 24, 2009 |
| 7502411 |
Method and circuit for adaptive equalization of multiple signals in response to a control signal generated from one of the equalized signals |
Mar. 10, 2009 |
| 7499509 |
Receiver for compensating nonlinearly distorted multicarrier signals |
Mar. 3, 2009 |
| 7477687 |
Balancing amplitude and phase |
Jan. 13, 2009 |
| 7469355 |
Auto tune dynamic over clocking |
Dec. 23, 2008 |
| 7466140 |
Signal generation circuit, jitter injection circuit, semiconductor chip and test apparatus |
Dec. 16, 2008 |
| 7461317 |
System and method for aligning a quadrature encoder and establishing a decoder processing speed |
Dec. 2, 2008 |
| 7453932 |
Test device and setting method |
Nov. 18, 2008 |
| 7443909 |
Weighted autocorrelation method for downlink CDMA LMMSE equalizers |
Oct. 28, 2008 |
| 7433418 |
Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats |
Oct. 7, 2008 |
| 7426243 |
Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
Sep. 16, 2008 |
| 7397758 |
Channel tracking in a OFDM wireless receiver |
Jul. 8, 2008 |
| 7394881 |
Radio receiver and/or transmitter including a programmable equalizer |
Jul. 1, 2008 |
| 7359459 |
System and method for low power clear channel assessment |
Apr. 15, 2008 |
| 7302013 |
Multi-mode variable rate digital satellite receiver |
Nov. 27, 2007 |
| 7289425 |
Parallel orthogonal frequency division multiplexed communication system |
Oct. 30, 2007 |
| 7280619 |
Method and apparatus for compensating I/Q imbalance in receivers |
Oct. 9, 2007 |
| 7209433 |
Channel estimation and compensation techniques for use in frequency division multiplexed systems |
Apr. 24, 2007 |
| 7173988 |
Adaptive phase and gain imbalance cancellation |
Feb. 6, 2007 |
| 7158578 |
Quadrature modulator with pulse-shaping |
Jan. 2, 2007 |
| 7130345 |
Configurable equalization apparatus for multicarrier communications |
Oct. 31, 2006 |
| 7127008 |
Coherent AM demodulator using a weighted LSB/USB sum for interference mitigation |
Oct. 24, 2006 |
| 7068714 |
Error control apparatus and method for channel equalizer |
Jun. 27, 2006 |
| 7061977 |
Apparatus and method for using adaptive algorithms to exploit sparsity in target weight vectors in an adaptive channel equalizer |
Jun. 13, 2006 |
| 7046726 |
Method and apparatus for hybrid decision feedback equalization |
May. 16, 2006 |
| 7042939 |
System for, and method of, processing quadrature amplitude modulated signals |
May. 9, 2006 |
| 7017104 |
Method and system for decoding block codes by calculating a path metric according to a decision feedback sequence estimation algorithm |
Mar. 21, 2006 |
| 6996169 |
Decision feedback equalizer |
Feb. 7, 2006 |
| 6973094 |
Packet-switched multiple-access network system with distributed fair priority queuing |
Dec. 6, 2005 |
| 6968170 |
Adaptive correction of a received signal frequency response tilt |
Nov. 22, 2005 |
| RE38876 |
System for, and method of, processing quadrature amplitude modulated signals |
Nov. 15, 2005 |
| 6952444 |
Blind DFE and phase correction |
Oct. 4, 2005 |
| 6947481 |
Code enhanced equalization based upon a reliability factor |
Sep. 20, 2005 |
| 6940898 |
Adaptive coefficient signal generator for adaptive signal equalizers with fractionally-spaced feedback |
Sep. 6, 2005 |
| 6907065 |
Real/complex dual combination channel equalizer |
Jun. 14, 2005 |
| 6898252 |
IQ mismatch cancellation |
May. 24, 2005 |
| 6895045 |
Balancing amplitude and phase |
May. 17, 2005 |
| 6867689 |
Power line communication modern not requiring extra plug socket |
Mar. 15, 2005 |
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