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Class Information
Number: 375/330
Name: Pulse or digital communications > Receivers > Angle modulation > Phase shift keying > Differential (diphase)
Description: Subject matter in which the bit interval representing one of the two binary levels is formed by a change in the phase of the received signal relative to the preceding bit interval, and the bit interval representing the other of the two binary levels is formed by the absence of a change of phase of the received signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7599452 |
Method and system for applying Viterbi type PSK demodulation for optimum correlation of GPS signals |
Oct. 6, 2009 |
| 7519134 |
Method and apparatus to determine phase difference between a received analog signal and a reference signal based upon a local oscillator |
Apr. 14, 2009 |
| 7508889 |
Digital apparatus for soft detection of multi-chip DBPSK signals |
Mar. 24, 2009 |
| 7487411 |
Multi symbol bit detection for SDPSK signals |
Feb. 3, 2009 |
| 7477707 |
Computationally efficient demodulation for differential phase shift keying |
Jan. 13, 2009 |
| 7474715 |
Variable load circuit for reducing quadrature phase error |
Jan. 6, 2009 |
| 7469022 |
Methods and apparatus for symmetrical phase-shift keying |
Dec. 23, 2008 |
| 7463108 |
Active 90-degree phase shifter with LC-type emitter degeneration and quadrature modulator IC using the same |
Dec. 9, 2008 |
| 7447275 |
IF FSK receiver |
Nov. 4, 2008 |
| 7433428 |
Method of reducing the variance of the signal-to-noise rate estimated for a signal with amplitude differential phase-shift keying modulation |
Oct. 7, 2008 |
| 7415078 |
Demodulation for phase modulation |
Aug. 19, 2008 |
| 7397848 |
Partial response receiver |
Jul. 8, 2008 |
| 7369623 |
Apparatuses to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards |
May. 6, 2008 |
| 7324613 |
Multi-layer differential phase shift keying with bit-interleaved coded modulation and OFDM |
Jan. 29, 2008 |
| 7321640 |
Active polyphase inverter filter for quadrature signal generation |
Jan. 22, 2008 |
| 7315587 |
Demodulation method and apparatus based on differential detection system for .pi./4 shifted QPSK modulated wave |
Jan. 1, 2008 |
| 7308049 |
Method and apparatus for noncoherent signal processing in pilotless wireless systems |
Dec. 11, 2007 |
| 7292655 |
Apparatus and method and decoding biphase signals |
Nov. 6, 2007 |
| 7245672 |
Method and apparatus for phase-domain semi-coherent demodulation |
Jul. 17, 2007 |
| 7190736 |
Technique to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards |
Mar. 13, 2007 |
| 7145966 |
Signal quality estimation for continuous phase modulation |
Dec. 5, 2006 |
| 7106804 |
Method of and system for modulating and demodulating a communication signal using differential quadrature phase shift keying (DQPSK) |
Sep. 12, 2006 |
| 7095807 |
Method for decoding biphase signals |
Aug. 22, 2006 |
| 7085337 |
Adaptive per-pair skew compensation method for extended reach differential transmission |
Aug. 1, 2006 |
| 7006584 |
Demodulator and demodulating method for mobile phone |
Feb. 28, 2006 |
| 6999502 |
Method for receiving CDMA signals with synchronization resulting from delayed double multiplication and corresponding receiver |
Feb. 14, 2006 |
| 6985531 |
Dual domain differential encoder/decoder |
Jan. 10, 2006 |
| 6973142 |
Timing synchronization for M-DPSK channels |
Dec. 6, 2005 |
| 6965654 |
Frequency offset quantity detecting apparatus |
Nov. 15, 2005 |
| 6959051 |
Clock regenerator for use in demodulating digital modulated signals |
Oct. 25, 2005 |
| 6956908 |
Technique to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards |
Oct. 18, 2005 |
| 6879267 |
Soft-output decoder with computation decision unit |
Apr. 12, 2005 |
| 6873666 |
Circuit and method for symbol timing recovery in phase modulation systems |
Mar. 29, 2005 |
| 6834089 |
Device for computing tangent angles and associated DQPSK decoder |
Dec. 21, 2004 |
| 6778616 |
Radio reception apparatus and received power amplification method |
Aug. 17, 2004 |
| 6748030 |
Differential phase demodulator incorporating 4th order coherent phase tracking |
Jun. 8, 2004 |
| 6744827 |
Demodulator arrangement, method to demodulate, and telecommunication system comprising such a demodulator arrangement |
Jun. 1, 2004 |
| 6678338 |
Receiver module and receiver formed from several cascaded modules |
Jan. 13, 2004 |
| 6597899 |
Image reject mixer circuit arrangements |
Jul. 22, 2003 |
| 6594322 |
Method of distributed loop control for a multicarrier telephony transport |
Jul. 15, 2003 |
| 6567474 |
Digital wireless phone/modem jack capable of communications over the power lines using differential binary phase shift keying (DBPSK) |
May. 20, 2003 |
| 6567480 |
Method and apparatus for sampling timing adjustment and frequency offset compensation |
May. 20, 2003 |
| 6546055 |
Carrier offset determination for RF signals having a cyclic prefix |
Apr. 8, 2003 |
| 6487252 |
Wireless communication system and method for synchronization |
Nov. 26, 2002 |
| 6445745 |
Phase encoding methods for handling multiple phase modulated signals on a single channel |
Sep. 3, 2002 |
| 6393067 |
Differential detection receiver |
May. 21, 2002 |
| 6381288 |
Method and apparatus for recovering data from a differential phase shift keyed signal |
Apr. 30, 2002 |
| 6373903 |
Apparatus and method for increasing the effective data rate in communication systems utilizing phase modulation |
Apr. 16, 2002 |
| 6363125 |
Non-coherent six-port receiver |
Mar. 26, 2002 |
| 6236848 |
Receiver integrated circuit for mobile telephone |
May. 22, 2001 |
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