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Class Information
Number: 329/306
Name: Demodulators > Phase shift keying or quadrature amplitude demodulator > Input signal combined with local oscillator or carrier frequency signal
Description: Subject matter where the modulated signal input to the demodulator interacts therein with oscillations from a secondary source.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7430247 |
Carrier frequency detection for N-ary phase modulated signal |
Sep. 30, 2008 |
| 7336732 |
Carrier frequency detection for signal acquisition |
Feb. 26, 2008 |
| 7251295 |
Apparatus for recovering carrier |
Jul. 31, 2007 |
| 7245655 |
Dual antenna receiver |
Jul. 17, 2007 |
| 7242729 |
Signal decoding method and apparatus |
Jul. 10, 2007 |
| 7242337 |
Band-pass .DELTA.-.SIGMA. AD modulator for AD-converting high frequency narrow-band signal with higher precision and lower power consumption |
Jul. 10, 2007 |
| 7218850 |
Apparatus and method for monitoring signal-to-noise ratio in optical transmission systems |
May. 15, 2007 |
| 7177364 |
System, decoder and method for transmitting, receiving and decoding high-speed digital data signals with reduced electromagnetic emissions |
Feb. 13, 2007 |
| 7164327 |
Compensation of the IQ phase asymmetry in quadrature modulation and demodulation methods |
Jan. 16, 2007 |
| 7099647 |
Single chip direct conversion transceiver for reducing DC offset and method of manufacturing the same |
Aug. 29, 2006 |
| 7092687 |
Five-port topology for direct down-conversion |
Aug. 15, 2006 |
| 7031399 |
Demodulator having automatic quadrature control function |
Apr. 18, 2006 |
| RE38932 |
Digital demodulator |
Jan. 10, 2006 |
| 6903603 |
Phase detection circuit and receiver |
Jun. 7, 2005 |
| 6879646 |
Quadrature amplitude modulation demodulator and receiver |
Apr. 12, 2005 |
| 6868129 |
Demodulator for a radio receiver and method of operation |
Mar. 15, 2005 |
| 6861900 |
Fast timing acquisition for multiple radio terminals |
Mar. 1, 2005 |
| 6833755 |
Modulator and demodulator |
Dec. 21, 2004 |
| 6813310 |
Receiver and IC thereof capable of receiving analog broadcast and digital broadcast |
Nov. 2, 2004 |
| 6803814 |
Demodulator and method for the demodulation of modulated RF signals |
Oct. 12, 2004 |
| 6724246 |
Demodulation structure and method |
Apr. 20, 2004 |
| 6717462 |
QPSK and 16 QAM self-generating synchronous direct downconversion demodulator |
Apr. 6, 2004 |
| 6704562 |
N-port receiver with RF/LO isolation |
Mar. 9, 2004 |
| 6654424 |
Method and device for tuning a first oscillator with a second oscillator and rotation rate sensor |
Nov. 25, 2003 |
| 6650715 |
Apparatus for recovering decision-directed carrier |
Nov. 18, 2003 |
| 6650178 |
N-port direct receiver |
Nov. 18, 2003 |
| 6628736 |
Estimating the optimal sampling instant in a TDMA packet transmission system |
Sep. 30, 2003 |
| 6624691 |
Demodulator for processing digital signal |
Sep. 23, 2003 |
| 6621332 |
Demodulator and demodulation method of DQPSK system with reduced circuit scale |
Sep. 16, 2003 |
| 6597900 |
Circuit arrangement providing impedance translation filtering |
Jul. 22, 2003 |
| 6580314 |
Demodulation system and method for recovering a signal of interest from a modulated carrier sampled at two times the phase generated carrier frequency |
Jun. 17, 2003 |
| 6570441 |
Incoherent demodulator and method of incoherently demodulating an IF signal |
May. 27, 2003 |
| 6545532 |
Timing recovery circuit in a QAM demodulator |
Apr. 8, 2003 |
| 6512799 |
Digital communication system and method for increased bit rates |
Jan. 28, 2003 |
| 6507625 |
Digital modulator and digital demodulator |
Jan. 14, 2003 |
| 6459741 |
Implementation of N-VSB training sequences in N-squared QAM receiver structures |
Oct. 1, 2002 |
| 6441683 |
Device and method for recovering frequency redundant data in a network communications receiver |
Aug. 27, 2002 |
| 6433630 |
Phase shifter, and demodulator employing it |
Aug. 13, 2002 |
| 6415004 |
Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device |
Jul. 2, 2002 |
| 6400233 |
Method and apparatus for compensating for distortion in IQ modulators |
Jun. 4, 2002 |
| 6341146 |
Phase-shift-keying demodulator and demodulation method using a period-width windowing technique |
Jan. 22, 2002 |
| 6330290 |
Digital I/Q imbalance compensation |
Dec. 11, 2001 |
| 6310513 |
Demodulator and demodulation method for demodulating quadrature modulation signals |
Oct. 30, 2001 |
| 6294952 |
Quadrature demodulator quadrature demodulation method and recording medium |
Sep. 25, 2001 |
| 6282248 |
Variable baud rate demodulator |
Aug. 28, 2001 |
| 6278746 |
Timing recovery loop circuit in a receiver of a modem |
Aug. 21, 2001 |
| 6268767 |
Dual bit error rate estimation in a QAM demodulator |
Jul. 31, 2001 |
| 6259314 |
Built-in self test for a satellite demodulator |
Jul. 10, 2001 |
| 6249179 |
Direct digital synthesis in a QAM demodulator |
Jun. 19, 2001 |
| 6249180 |
Phase noise and additive noise estimation in a QAM demodulator |
Jun. 19, 2001 |
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