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Class Information
Number: 329/304
Name: Demodulators > Phase shift keying or quadrature amplitude demodulator
Description: Subject matter where the demodulator extracts the modulating signal from a signal which has undergone phase shift keying modulation or quadrature amplitude modulation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6566941 |
Method and device of phase detection in phase modulation systems |
May. 20, 2003 |
| 6549588 |
Communications system and corresponding receiver unit |
Apr. 15, 2003 |
| 6546237 |
Differential FM detector for radio receivers |
Apr. 8, 2003 |
| 6545532 |
Timing recovery circuit in a QAM demodulator |
Apr. 8, 2003 |
| 6542028 |
System and method for efficient demodulation and filtering of a received signal |
Apr. 1, 2003 |
| 6529783 |
Process for estimating a parasite phase shift during reception of a multi-carrier signal and the corresponding receiver |
Mar. 4, 2003 |
| 6518836 |
Frequency-variation type demodulator and demodulating method |
Feb. 11, 2003 |
| 6496542 |
Digital communication system |
Dec. 17, 2002 |
| 6487254 |
Methods and devices for estimating QAM symbol sequences over flat fading channels using multiple offset sequences |
Nov. 26, 2002 |
| 6486732 |
Modulator-demodulator |
Nov. 26, 2002 |
| 6466086 |
Quadrature demodulator with phase-locked loop |
Oct. 15, 2002 |
| 6462626 |
Quadrature output oscillator device |
Oct. 8, 2002 |
| 6459796 |
AM stereo receiver with reduced distortion |
Oct. 1, 2002 |
| 6449322 |
Maximum likelihood detection of MPSK bursts with inserted reference symbols |
Sep. 10, 2002 |
| 6449471 |
Wireless terminal device |
Sep. 10, 2002 |
| 6445746 |
IS-136+ slot formation |
Sep. 3, 2002 |
| 6442217 |
Digital communication receiver with digital, IF, I-Q balancer |
Aug. 27, 2002 |
| 6442216 |
Digital demodulator using boxcar filters and boxcar filter sections |
Aug. 27, 2002 |
| 6441683 |
Device and method for recovering frequency redundant data in a network communications receiver |
Aug. 27, 2002 |
| 6411661 |
Digital timing recovery loop for GMSK demodulators |
Jun. 25, 2002 |
| 6400233 |
Method and apparatus for compensating for distortion in IQ modulators |
Jun. 4, 2002 |
| 6389082 |
Receiver |
May. 14, 2002 |
| 6381288 |
Method and apparatus for recovering data from a differential phase shift keyed signal |
Apr. 30, 2002 |
| 6366622 |
Apparatus and method for wireless communications |
Apr. 2, 2002 |
| 6363100 |
Radio data communication system using spread spectrum scheme |
Mar. 26, 2002 |
| 6356145 |
Demodulator circuit which demodulates a signal without any restriction from a clock signal |
Mar. 12, 2002 |
| 6353358 |
Quadrature demodulation circuit with a pseudo locked state detection system |
Mar. 5, 2002 |
| 6341146 |
Phase-shift-keying demodulator and demodulation method using a period-width windowing technique |
Jan. 22, 2002 |
| 6310513 |
Demodulator and demodulation method for demodulating quadrature modulation signals |
Oct. 30, 2001 |
| 6304136 |
Reduced noise sensitivity, high performance FM demodulator circuit and method |
Oct. 16, 2001 |
| 6301307 |
Methods and apparatuses for the transmission and receipt of digital data modulated using quadrature amplitude modulation, and communication devices utilizing such apparatuses and methods |
Oct. 9, 2001 |
| 6297691 |
Method and apparatus for demodulating coherent and non-coherent modulated signals |
Oct. 2, 2001 |
| 6292518 |
Use of 64-QAM circuitry for receiving and decoding 8-VSB signals |
Sep. 18, 2001 |
| 6285721 |
Method for assisting simple synchronization to the carrier of a dispersed-energy QPSK signal |
Sep. 4, 2001 |
| 6282248 |
Variable baud rate demodulator |
Aug. 28, 2001 |
| 6268767 |
Dual bit error rate estimation in a QAM demodulator |
Jul. 31, 2001 |
| 6266377 |
Method of timing recovery convergence monitoring in modems |
Jul. 24, 2001 |
| 6263028 |
Apparatus and method for measuring modulation accuracy |
Jul. 17, 2001 |
| 6259748 |
Signal offset elimination |
Jul. 10, 2001 |
| 6259314 |
Built-in self test for a satellite demodulator |
Jul. 10, 2001 |
| 6256359 |
RDS signal detection device |
Jul. 3, 2001 |
| 6256357 |
Communication system |
Jul. 3, 2001 |
| 6252453 |
Device and method for signal resampling between phase related clocks |
Jun. 26, 2001 |
| 6249180 |
Phase noise and additive noise estimation in a QAM demodulator |
Jun. 19, 2001 |
| 6249179 |
Direct digital synthesis in a QAM demodulator |
Jun. 19, 2001 |
| 6246281 |
Absolute phasing circuit |
Jun. 12, 2001 |
| 6246730 |
Method and arrangement for differentially detecting an MPSK signal using a plurality of past symbol data |
Jun. 12, 2001 |
| 6240142 |
Quadrature modulator and demodulator |
May. 29, 2001 |
| 6236263 |
Demodulator having cross polarization interference canceling function |
May. 22, 2001 |
| 6236690 |
Direct-conversion receiver for digital-modulation signal |
May. 22, 2001 |
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