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Class Information
Number: 375/332
Name: Pulse or digital communications > Receivers > Angle modulation > Phase shift keying > Plural phase (>2)
Description: Subject matter where the received signal can assume one of at least three possible phases during a bit interval.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7613254 |
Phase detector for comparing phases of data and a plurality of clocks |
Nov. 3, 2009 |
| 7613253 |
Noise balanced QAM detection |
Nov. 3, 2009 |
| 7606332 |
Variable signal delaying circuit, quadrature frequency converter and radio frequency tuner |
Oct. 20, 2009 |
| 7599452 |
Method and system for applying Viterbi type PSK demodulation for optimum correlation of GPS signals |
Oct. 6, 2009 |
| 7583759 |
Baseband time-domain communications method |
Sep. 1, 2009 |
| 7573943 |
Interference cancellation system |
Aug. 11, 2009 |
| 7545889 |
Blocker performance in a radio receiver |
Jun. 9, 2009 |
| 7529534 |
Signal converter for converting a start signal to an end signal and method for converting a start signal to an end signal |
May. 5, 2009 |
| RE40695 |
Clock phase detecting circuit and clock regenerating circuit each arranged in receiving unit of multiplex radio equipment |
Apr. 7, 2009 |
| 7492838 |
Apparatus for compensating for phase mismatch in QPSK demodulator |
Feb. 17, 2009 |
| 7492835 |
Synchrodyning apparatus |
Feb. 17, 2009 |
| 7483498 |
Frequency content separation using complex frequency shifting converters |
Jan. 27, 2009 |
| 7480351 |
Technique for demodulating level II hierarchical data |
Jan. 20, 2009 |
| 7477708 |
Modes of operations in QAM modems |
Jan. 13, 2009 |
| 7477879 |
Transceiver system with common receiver and transmitter oscillator |
Jan. 13, 2009 |
| 7471134 |
Mixer with clock resynchronization and method therefor |
Dec. 30, 2008 |
| 7469022 |
Methods and apparatus for symmetrical phase-shift keying |
Dec. 23, 2008 |
| 7466769 |
Method and apparatus of cross-correlation |
Dec. 16, 2008 |
| 7411931 |
Inter-frequency measurements with MIMO terminals |
Aug. 12, 2008 |
| 7376208 |
Reception method for packetized information with automatic repeat request |
May. 20, 2008 |
| RE40206 |
Communication system |
Apr. 1, 2008 |
| 7336731 |
Demodulator with phase-adjusting function |
Feb. 26, 2008 |
| 7327808 |
Pipelined adaptive decision feedback equalizer |
Feb. 5, 2008 |
| 7321641 |
Baseband time-domain communications system |
Jan. 22, 2008 |
| RE39983 |
Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size |
Jan. 1, 2008 |
| 7292653 |
Carrier lock detector |
Nov. 6, 2007 |
| 7292655 |
Apparatus and method and decoding biphase signals |
Nov. 6, 2007 |
| 7283593 |
Distance determinations associated with a trellis decoder |
Oct. 16, 2007 |
| 7277504 |
Method and system for concurrent estimation of frequency offset and modulation index |
Oct. 2, 2007 |
| 7254189 |
Blind carrier offset detection for quadrature modulated digital communication systems |
Aug. 7, 2007 |
| 7251295 |
Apparatus for recovering carrier |
Jul. 31, 2007 |
| 7221719 |
Apparatus and method for receiving BS digital broadcast |
May. 22, 2007 |
| 7215939 |
Apparatus and method for detecting ripples caused by multipath propagation and controlling receiving antenna and tuner |
May. 8, 2007 |
| 7203253 |
Method and apparatus of cross-correlation |
Apr. 10, 2007 |
| 7197091 |
Direct conversion receiver with direct current offset correction circuitry |
Mar. 27, 2007 |
| 7184740 |
Direct conversion receiver for calibrating phase and gain mismatch |
Feb. 27, 2007 |
| 7161975 |
Enhancing CDMA multiuser detection by constraining soft decisions |
Jan. 9, 2007 |
| 7158577 |
Communication system |
Jan. 2, 2007 |
| 7082172 |
Digital signal gating apparatus and method in a pulse receiver system |
Jul. 25, 2006 |
| 7061997 |
Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems |
Jun. 13, 2006 |
| 7062228 |
Cellular communications system using baseband carrier injection and related methods |
Jun. 13, 2006 |
| 7042957 |
Method and communication system for transmitting information with the aid of a multicarrier method |
May. 9, 2006 |
| 7039130 |
RF receiver phase correction circuit using cordic and vector averaging functions and method of operation |
May. 2, 2006 |
| 7027502 |
Run-time coefficient generation for digital filter with slewing bandwidth |
Apr. 11, 2006 |
| 7020185 |
Method and apparatus for determining channel conditions in a communication system |
Mar. 28, 2006 |
| 6977972 |
Method of hybrid soft/hard decision demodulation of signals with multilevel modulation |
Dec. 20, 2005 |
| 6922451 |
Frequency shifting circuit and method |
Jul. 26, 2005 |
| 6904104 |
Technique for demodulating a linear modulated data signal in a communications system |
Jun. 7, 2005 |
| 6895060 |
Adaptive weighting method for orthogonal frequency division multiplexed soft symbols using channel state information estimates |
May. 17, 2005 |
| 6865217 |
Method for simultaneously receiving and processing multiple channels of data |
Mar. 8, 2005 |
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