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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 |
| 5818876 |
Method and apparatus of adaptive maximum likelihood sequence estimation using a variable convergence step size |
Oct. 6, 1998 |
| 5818297 |
Digital demodulator for a phase-modulated signal |
Oct. 6, 1998 |
| 5818875 |
Modulation and demodulation method, modulator and demodulator |
Oct. 6, 1998 |
| 5808509 |
Receiver and demodulator for phase or frequency modulated signals |
Sep. 15, 1998 |
| 5805018 |
High-speed demodulating method of burst data and apparatus for same |
Sep. 8, 1998 |
| 5805642 |
Method for detecting differently encoded signal sequences using a recursively computed reference signal |
Sep. 8, 1998 |
| 5805241 |
Noise-immune automatic gain control for QAM radio receivers |
Sep. 8, 1998 |
| 5796786 |
Phase error detecting method and phase tracking loop circuit |
Aug. 18, 1998 |
| 5790590 |
Matched filter circuit |
Aug. 4, 1998 |
| 5790600 |
Method of compensating differences in group propagation times between the analog filters of a transmitter and between those of a receiver for signals in phase quadrature corresponding compensa |
Aug. 4, 1998 |
| 5789988 |
Clock recovery circuit for QAM demodulator |
Aug. 4, 1998 |
| 5786725 |
Reduced complexity maximum likelihood multiple symbol differential detector |
Jul. 28, 1998 |
| 5784686 |
IQ combiner technology in modulated backscatter system |
Jul. 21, 1998 |
| 5777511 |
Data demodulation apparatus |
Jul. 7, 1998 |
| 5767738 |
Apparatus and method for demodulating a modulated signal |
Jun. 16, 1998 |
| 5764102 |
Multi-stage symbol synchronization |
Jun. 9, 1998 |
| 5764707 |
Method and apparatus for improved phase shift keyed (PSK) signal demodulation |
Jun. 9, 1998 |
| 5764705 |
Adaptive phase shift adjuster for resonator |
Jun. 9, 1998 |
| 5760645 |
Demodulator stage for direct demodulation of a phase quadrature modulated signal and receiver including a demodulator stage of this kind |
Jun. 2, 1998 |
| 5761251 |
Dual automatic gain control and DC offset correction circuit for QAM demodulation |
Jun. 2, 1998 |
| 5757862 |
Demodulator, modulation and demodulation system, and demodulation method |
May. 26, 1998 |
| 5754589 |
Noncompressed voice and data communication over modem for a computer-based multifunction personal communications system |
May. 19, 1998 |
| 5751187 |
Method and device for phase-modulated signals |
May. 12, 1998 |
| 5748682 |
Oscillator frequency offset error estimator for communications systems |
May. 5, 1998 |
| 5745005 |
Demodulating system for carrier-wave and single pulse modulated signals |
Apr. 28, 1998 |
| 5742637 |
Fast phase estimation in digital communication systems |
Apr. 21, 1998 |
| 5740202 |
Method and apparatus for digitally evaluating the phase of a modulated carrier |
Apr. 14, 1998 |
| 5732105 |
Method of estimating signal quality in a DPSK demodulator |
Mar. 24, 1998 |
| 5719903 |
Method and apparatus for receiving symbols |
Feb. 17, 1998 |
| 5717722 |
Precision symbol demodulation system for multi-carrier modulation signal |
Feb. 10, 1998 |
| 5705958 |
Apparatus for correcting quadrature error in a modulator and/or in a demodulator for a signal having a plurality of phase states, a corresponding transmitter, and a corresponding receiver |
Jan. 6, 1998 |
| 5705949 |
Compensation method for I/Q channel imbalance errors |
Jan. 6, 1998 |
| 5703526 |
Circuit for detecting the locked condition of PSK or QAM demodulators |
Dec. 30, 1997 |
| 5703908 |
Fixed reference shift keying modulation for mobile radio telecommunications |
Dec. 30, 1997 |
| 5692013 |
Shared resources modulator-demodulator circuits for use with quadrature amplitude modulated signals |
Nov. 25, 1997 |
| 5684835 |
Locally coherent QPSK detection with differential decoding for a fading channel |
Nov. 4, 1997 |
| 5673291 |
Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols |
Sep. 30, 1997 |
| 5661761 |
Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same |
Aug. 26, 1997 |
| 5657355 |
Signal processor module |
Aug. 12, 1997 |
| 5651031 |
Clock recovery circuit of demodulator |
Jul. 22, 1997 |
| 5640417 |
QAM detector which compensates for received symbol distortion induced by a cellular base station |
Jun. 17, 1997 |
| 5636253 |
Method for detecting erasures in received digital data |
Jun. 3, 1997 |
| 5627862 |
Apparatus for demodulating phase modulated WAVE |
May. 6, 1997 |
| 5625649 |
Clock recovery circuit of demodulator |
Apr. 29, 1997 |
| 5623516 |
Frame synchronization for QAM |
Apr. 22, 1997 |
| 5621483 |
Polarity selection circuit for bi-phase stable FPLL |
Apr. 15, 1997 |
| 5619167 |
Maximum likelihood decoding coherent detection method |
Apr. 8, 1997 |
| 5610948 |
Digital demodulation apparatus |
Mar. 11, 1997 |
| 5610949 |
Phase detector and a method determining the phase of received PSK symbols |
Mar. 11, 1997 |
| 5608760 |
Method and circuits for the transmission and reception of numeric signals, in which the peak power of the filtered signal transmitted is reduced, compatible with conventional coding techniques |
Mar. 4, 1997 |
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