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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 |
| 5602507 |
Adaptive demodulating method for generating replica and demodulator thereof |
Feb. 11, 1997 |
| 5602868 |
Multiple-modulation communication system |
Feb. 11, 1997 |
| 5598125 |
Method for demodulating a digitally modulated signal and a demodulator |
Jan. 28, 1997 |
| 5594758 |
Frequency controller and method of correcting phase estimates in a PSK demodulator using frequency control |
Jan. 14, 1997 |
| 5594759 |
Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same |
Jan. 14, 1997 |
| 5590158 |
Method and apparatus for estimating PSK modulated signals |
Dec. 31, 1996 |
| 5588027 |
Digital demodulating method and circuit for use in a time-division multiple access channel |
Dec. 24, 1996 |
| 5588026 |
Method of compensating phase shift keying frequency offset |
Dec. 24, 1996 |
| 5586147 |
Demodulation method using quadrature modulation |
Dec. 17, 1996 |
| 5585761 |
Demodulation of digital phase modulated signal |
Dec. 17, 1996 |
| 5581579 |
Method and apparatus to adaptively control the frequency of reception in a digital wireless communication system |
Dec. 3, 1996 |
| 5579343 |
Soft decision circuit |
Nov. 26, 1996 |
| 5566210 |
Data receiving apparatus |
Oct. 15, 1996 |
| 5566211 |
Automatic frequency control method and apparatus therefor |
Oct. 15, 1996 |
| 5555275 |
Multi-threshold and hierarchical television signal transmission system |
Sep. 10, 1996 |
| 5553098 |
Demodulator with selectable coherent and differential data |
Sep. 3, 1996 |
| 5553081 |
Apparatus and method for detecting a signal in a communications system |
Sep. 3, 1996 |
| 5550506 |
DQPSK demodulator capable of improving a symbol error rate without decreasing a transmission rate |
Aug. 27, 1996 |
| 5550866 |
Digital demodulator reference signal generator having DC blocker and first Hilbert transformation with quadrature output followed by gain staging and combination for second Hilbert transformat |
Aug. 27, 1996 |
| 5535245 |
Modulation/demodulation circuit for a digital signal recorder/reproducer |
Jul. 9, 1996 |
| 5533060 |
Multi-phase PSK signal decoder including phase display generator with phase correcting feedback |
Jul. 2, 1996 |
| 5519356 |
Methods and apparatuses for fast decision directed carrier recovery with wide locking range |
May. 21, 1996 |
| 5515400 |
Method for arranging signal points in a quadrature amplitude modulation/demodulation system |
May. 7, 1996 |
| 5513220 |
Digital receiver with minimum cost index register |
Apr. 30, 1996 |
| 5511097 |
Delay detection circuit |
Apr. 23, 1996 |
| 5504453 |
Method and device for estimating phase error |
Apr. 2, 1996 |
| 5504455 |
Efficient digital quadrature demodulator |
Apr. 2, 1996 |
| 5504454 |
Demodulator for powerline carrier communications |
Apr. 2, 1996 |
| 5500620 |
Timing recovery for digital demodulation |
Mar. 19, 1996 |
| 5500876 |
Phase error canceller for QPSK signals using unique word detectors |
Mar. 19, 1996 |
| 5493587 |
Method and circuits for reducing the peak power of the filtered signal transmitted in a digital link |
Feb. 20, 1996 |
| 5491713 |
Minimized oversampling Manchester decoder |
Feb. 13, 1996 |
| 5477195 |
Near optimal quasi-coherent delay lock loop (QCDLL) for tracking direct sequence signals and CDMA |
Dec. 19, 1995 |
| 5475705 |
Demodulator for Manchester-coded FM signals |
Dec. 12, 1995 |
| 5473280 |
Modulation/demodulation method and system for realizing quadrature modulation/demodulation technique used in digital mobile radio system with complex signal processing |
Dec. 5, 1995 |
| 5465271 |
Post detection weighted vector combining diversity receivers using phase metrics for mobile and indoor radio channels |
Nov. 7, 1995 |
| 5461643 |
Direct phase digitizing apparatus and method |
Oct. 24, 1995 |
| 5457423 |
Radio data signal demodulator with clock signal recovery |
Oct. 10, 1995 |
| 5448201 |
Clock recovery circuit in .pi./4 shift quadriphase PSK demodulator |
Sep. 5, 1995 |
| 5448206 |
Systems with increased information rates using embedded sample modulation and predistortion equalization |
Sep. 5, 1995 |
| 5448594 |
One bit differential detector with frequency offset compensation |
Sep. 5, 1995 |
| 5448555 |
Simultaneous analog and digital communication |
Sep. 5, 1995 |
| 5442626 |
Digital communications system with symbol multiplexers |
Aug. 15, 1995 |
| 5440265 |
Differential/coherent digital demodulator operating at multiple symbol points |
Aug. 8, 1995 |
| 5440587 |
Demodulator for digitally modulated wave |
Aug. 8, 1995 |
| 5438594 |
Device for demodulating digital signals modulated by an alternating modulation constellation technique |
Aug. 1, 1995 |
| 5436591 |
Demodulator for radio data signals |
Jul. 25, 1995 |
| 5434893 |
Component for a differential transmitter-receiver of signals with direct sequence spread spectrum and the corresponding transmitter-receiver |
Jul. 18, 1995 |
| 5432786 |
Modem for modulating and demodulating main signal and secondary signal with clock synchronized system and transforming secondary signal between start-stop system and clock-synchronized system |
Jul. 11, 1995 |
| 5425055 |
Digital radio modulator |
Jun. 13, 1995 |
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