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Class Information
Number: 375/331
Name: Pulse or digital communications > Receivers > Angle modulation > Phase shift keying > Differential (diphase) > More than two phases
Description: Subject matter in which there are at least three possible phases that the received signal can assume.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7613261 |
Method of estimating symbol synchronization in OQPSK demodulator |
Nov. 3, 2009 |
| 7606328 |
Common signal generation for an RF receiver |
Oct. 20, 2009 |
| 7599452 |
Method and system for applying Viterbi type PSK demodulation for optimum correlation of GPS signals |
Oct. 6, 2009 |
| 7567642 |
Phase detector with extended linear operating range |
Jul. 28, 2009 |
| 7567631 |
Method for amplitude insensitive packet detection |
Jul. 28, 2009 |
| 7542529 |
Wireless receiving device suppressing occurrence of reception error |
Jun. 2, 2009 |
| 7542521 |
Direct-conversion frequency mixer |
Jun. 2, 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 |
| 7469022 |
Methods and apparatus for symmetrical phase-shift keying |
Dec. 23, 2008 |
| 7440410 |
Off-line broadband network interface |
Oct. 21, 2008 |
| 7391840 |
Phase locked loop circuit, electronic device including a phase locked loop circuit and method for generating a periodic signal |
Jun. 24, 2008 |
| 7315587 |
Demodulation method and apparatus based on differential detection system for .pi./4 shifted QPSK modulated wave |
Jan. 1, 2008 |
| 7295601 |
Method and apparatus for performing digital timing recovery on oversampled 802.11b baseband signals |
Nov. 13, 2007 |
| 7292655 |
Apparatus and method and decoding biphase signals |
Nov. 6, 2007 |
| 7277504 |
Method and system for concurrent estimation of frequency offset and modulation index |
Oct. 2, 2007 |
| 7177374 |
Apparatus and method for sampling frequency offset estimation and correction in a wireless communication system |
Feb. 13, 2007 |
| 7109787 |
High-efficiency circuit for demodulating carriers in quadrature |
Sep. 19, 2006 |
| 7095807 |
Method for decoding biphase signals |
Aug. 22, 2006 |
| 7092461 |
Polyphase receivers |
Aug. 15, 2006 |
| 7072426 |
Demodulation apparatus and method in a communication system employing 8-ary PSK modulation |
Jul. 4, 2006 |
| 7046743 |
Demodulator for demodulating digital modulated signals |
May. 16, 2006 |
| 7016425 |
Quasi-differential modulation/demodulation method for multi-amplitude digital modulated signals and OFDM system |
Mar. 21, 2006 |
| 6999502 |
Method for receiving CDMA signals with synchronization resulting from delayed double multiplication and corresponding receiver |
Feb. 14, 2006 |
| 6834089 |
Device for computing tangent angles and associated DQPSK decoder |
Dec. 21, 2004 |
| 6823026 |
Apparatus and method for baseband detection |
Nov. 23, 2004 |
| 6748216 |
Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems |
Jun. 8, 2004 |
| 6690745 |
Circuit for detecting the phase of received signal |
Feb. 10, 2004 |
| 6683921 |
Received-signal absolute phasing apparatus of receiver |
Jan. 27, 2004 |
| 6611548 |
Multipath processor |
Aug. 26, 2003 |
| 6608874 |
Method and apparatus for quadrature multi-pulse modulation of data for spectrally efficient communication |
Aug. 19, 2003 |
| 6590945 |
Method and apparatus for frequency offset compensation |
Jul. 8, 2003 |
| 6567480 |
Method and apparatus for sampling timing adjustment and frequency offset compensation |
May. 20, 2003 |
| 6563887 |
Direct conversion receiver for frequency-shift keying modulated signals |
May. 13, 2003 |
| 6546237 |
Differential FM detector for radio receivers |
Apr. 8, 2003 |
| 6332208 |
Data transmitting apparatus and data transmitting method |
Dec. 18, 2001 |
| 6229889 |
Robust signaling tone frequency measurement |
May. 8, 2001 |
| 6208201 |
Recovery of a carrier signal from a modulated input signal |
Mar. 27, 2001 |
| 6163208 |
One bit digital phase shift keyed carrier recovery and demodulator circuit |
Dec. 19, 2000 |
| 6118827 |
Apparatus for providing increased data rates within existing modulation systems |
Sep. 12, 2000 |
| 6075827 |
DQPSK mapping circuit |
Jun. 13, 2000 |
| 5987068 |
Method and apparatus for enhanced communication capability while maintaining standard channel modulation compatibility |
Nov. 16, 1999 |
| 5960044 |
Apparatus and method for block phase estimation |
Sep. 28, 1999 |
| 5946360 |
Frequency offset compensation using dotting sequences |
Aug. 31, 1999 |
| 5946359 |
Parameter measuring apparatus for digital quadrature modulation signals |
Aug. 31, 1999 |
| 5943370 |
Direct conversion receiver |
Aug. 24, 1999 |
| 5940451 |
Automatic gain control in quadrature phase shift keying demodulator |
Aug. 17, 1999 |
| 5940450 |
Carrier recovery method and apparatus |
Aug. 17, 1999 |
| 5889759 |
OFDM timing and frequency recovery system |
Mar. 30, 1999 |
| 5841816 |
Diversity Pi/4-DQPSK demodulation |
Nov. 24, 1998 |
| 5838797 |
Secure communication by encryption/decryption of vector at PSK modulation/detection stage |
Nov. 17, 1998 |
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