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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 |
| 6226333 |
QAM de-mapping circuit |
May. 1, 2001 |
| 6218896 |
Vectored demodulation and frequency estimation apparatus and method |
Apr. 17, 2001 |
| 6208201 |
Recovery of a carrier signal from a modulated input signal |
Mar. 27, 2001 |
| 6204726 |
Digital demodulator |
Mar. 20, 2001 |
| 6204725 |
Circuit for demodulating digital signal undergoing different modulation schemes |
Mar. 20, 2001 |
| 6195396 |
Encoding/decoding system using 16-QAM modulation encoded in multi-level blocks |
Feb. 27, 2001 |
| 6191649 |
Quadrature demodulator and method for quadrature demodulation |
Feb. 20, 2001 |
| 6181750 |
Apparatus for estimating the frequency difference existing between the carrier frequency of a digital signal and the frequency of a receiver local oscillator |
Jan. 30, 2001 |
| 6177835 |
Method and apparatus for high data rate demodulation |
Jan. 23, 2001 |
| 6169448 |
Digital demodulator |
Jan. 2, 2001 |
| 6163208 |
One bit digital phase shift keyed carrier recovery and demodulator circuit |
Dec. 19, 2000 |
| 6160443 |
Dual automatic gain control in a QAM demodulator |
Dec. 12, 2000 |
| 6160855 |
Digital modulation method and digital communication system |
Dec. 12, 2000 |
| 6147560 |
Method and device relating to supervision and control of an oscillator signal |
Nov. 14, 2000 |
| 6137829 |
System and method for transmitting special marker symbols |
Oct. 24, 2000 |
| 6133785 |
False carrier lock receiver and associated methods for detection |
Oct. 17, 2000 |
| 6130577 |
Digital demodulators for phase modulated and amplitude-phase modulated signals |
Oct. 10, 2000 |
| 6130887 |
Methods of dynamically switching return channel transmissions of time-division multiple-access (TDMA) communication systems between signalling burst transmissions and message transmissions |
Oct. 10, 2000 |
| 6127897 |
Zero-crossing detection type clock recovery circuit operated at symbol rate |
Oct. 3, 2000 |
| 6128353 |
Code division multiple access system with dynamic histogram control |
Oct. 3, 2000 |
| 6127884 |
Differentiate and multiply based timing recovery in a quadrature demodulator |
Oct. 3, 2000 |
| 6122333 |
Delay detection demodulation system |
Sep. 19, 2000 |
| 6121828 |
Demodulator |
Sep. 19, 2000 |
| 6118831 |
Data demodulator device |
Sep. 12, 2000 |
| 6115431 |
Phase detecting method and phase tracking loop circuit for a digital vestigial sideband modulation communication device |
Sep. 5, 2000 |
| 6101217 |
System and method for demodulating digital information from an odd constellation |
Aug. 8, 2000 |
| 6100755 |
Phase decision circuit |
Aug. 8, 2000 |
| 6094450 |
Spread spectrum chip shift keying modulation/demodulation system and method |
Jul. 25, 2000 |
| 6091306 |
Circuit configuration with main and subordinate oscillators |
Jul. 18, 2000 |
| 6088402 |
QAM spread spectrum demodulation system |
Jul. 11, 2000 |
| 6088401 |
QAM signal receiver |
Jul. 11, 2000 |
| 6075408 |
OQPSK phase and timing detection |
Jun. 13, 2000 |
| 6075826 |
Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitting data |
Jun. 13, 2000 |
| 6075409 |
Demodulation method and arrangement |
Jun. 13, 2000 |
| 6075829 |
Digital broadcast receiver |
Jun. 13, 2000 |
| 6072841 |
Block phase estimator for the coherent detection of non-differentially phase modulated data bursts on rician fading channels |
Jun. 6, 2000 |
| 6067325 |
Modem designs, and systems using the modem designs for communicating information between a number of remote locations and one or more central locations |
May. 23, 2000 |
| 6067329 |
VSB demodulator |
May. 23, 2000 |
| 6064702 |
Four-stage phase demodulation low frequency wireless mouse device |
May. 16, 2000 |
| 6057730 |
Digital demodulator |
May. 2, 2000 |
| 6055281 |
Passband DQPSK detector for a digital communications receiver |
Apr. 25, 2000 |
| 6046629 |
Method of an apparatus for demodulating amplitude-modulated signals in an amplitude phase shift keying (APSK) system |
Apr. 4, 2000 |
| 6046630 |
.pi./4 QPSK digital demodulating apparatus and a method thereof |
Apr. 4, 2000 |
| 6044109 |
Modem signal transmitter, modem signal transmitting method, modem signal receiver, modem signal receiving method, modem signal transmitting/receiving system and modem signal transmitting/recei |
Mar. 28, 2000 |
| 6041085 |
Carrier regenerating circuit, multi-level quadrature amplitude demodulator, and method of detecting frequency deviation |
Mar. 21, 2000 |
| 6038267 |
Digital demodulator, maximum-value selector, and diversity receiver |
Mar. 14, 2000 |
| 6034564 |
Demodulator using quasi-synchronous detection to demodulate modulated quadrature input signals |
Mar. 7, 2000 |
| 6028475 |
Method and apparatus for demodulating multi-level QAM signal |
Feb. 22, 2000 |
| 6028900 |
Digital broadcast receiver |
Feb. 22, 2000 |
| 6021157 |
Fast phase estimation in digital communication systems |
Feb. 1, 2000 |
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