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Class Information
Number: 375/344
Name: Pulse or digital communications > Receivers > Automatic frequency control
Description: Subject matter where a receiver frequency response characteristic is set or adjusted in response to frequency changes in the input signal or charges in the receiver parameters.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7330523 |
Estimating frequency offset |
Feb. 12, 2008 |
| 7327811 |
Method and apparatus for facilitating signal discrimination in a wireless network by applying known frequency offsets |
Feb. 5, 2008 |
| 7324609 |
DC offset cancellation in a direct conversion receiver configured for receiving an OFDM signal |
Jan. 29, 2008 |
| 7324432 |
Apparatus of compensating for frequency offset using pilot symbol in an orthogonal frequency division multiplexing system |
Jan. 29, 2008 |
| 7315590 |
Reverse spreading device, timing detecting device, channel estimating device, frequency error measurement method and automatic frequency control method |
Jan. 1, 2008 |
| 7315591 |
Reproduced signal waveform processing apparatus |
Jan. 1, 2008 |
| 7310302 |
Method for estimating time and frequency offset in an OFDM system |
Dec. 18, 2007 |
| 7308017 |
DS-CDMA integration spreading coherent receiver |
Dec. 11, 2007 |
| 7308053 |
Iterative data-aided carrier frequency offset estimation for code division multiple access systems |
Dec. 11, 2007 |
| 7305053 |
Dat-aided frequency offset detection using phase unwrapping |
Dec. 4, 2007 |
| 7299023 |
Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence |
Nov. 20, 2007 |
| 7298800 |
Analog signal control method, analog signal controller, and automatic gain controller |
Nov. 20, 2007 |
| 7295601 |
Method and apparatus for performing digital timing recovery on oversampled 802.11b baseband signals |
Nov. 13, 2007 |
| 7292660 |
Delta-phase detection method and system |
Nov. 6, 2007 |
| 7280626 |
Synthesizing coherent correlation sums at one or multiple carrier frequencies using correlation sums calculated at a coarse set of frequencies |
Oct. 9, 2007 |
| 7277509 |
Low complexity frequency-offset correction method |
Oct. 2, 2007 |
| 7274757 |
Autocorrelation threshold generation based on median filtering for symbol boundary detection in an OFDM receiver |
Sep. 25, 2007 |
| 7274758 |
Coarse frequency estimation in an OFDM receiver based on autocorrelation of accumulated samples |
Sep. 25, 2007 |
| 7272187 |
Filter circuit and radio apparatus |
Sep. 18, 2007 |
| 7269236 |
Frequency offset estimator |
Sep. 11, 2007 |
| 7263139 |
Phase correction for a phase modulated signal with mutually interfering symbols |
Aug. 28, 2007 |
| 7263142 |
Apparatus and method for synchronizing symbol timing using timing loop controller |
Aug. 28, 2007 |
| 7257172 |
Signal processing device utilizing partial response maximum likelihood detection |
Aug. 14, 2007 |
| 7257176 |
Method of frequency and phase offset estimation using least square method in a burst receiver |
Aug. 14, 2007 |
| 7254189 |
Blind carrier offset detection for quadrature modulated digital communication systems |
Aug. 7, 2007 |
| 7254182 |
Transmitter for operating multiple devices |
Aug. 7, 2007 |
| 7254169 |
Method and apparatus for determining a loss of signal condition |
Aug. 7, 2007 |
| 7254161 |
Method for frequency offset estimation in a direct sequence spread spectrum communications receiver |
Aug. 7, 2007 |
| 7251300 |
Method and apparatus for frequency tracking based on recovered data |
Jul. 31, 2007 |
| 7251295 |
Apparatus for recovering carrier |
Jul. 31, 2007 |
| 7245677 |
Efficient method for multi-path resistant carrier and timing frequency offset detection |
Jul. 17, 2007 |
| 7242916 |
Communication semiconductor integrated circuit device and wireless communication system |
Jul. 10, 2007 |
| 7236547 |
Start-up automatic frequency control (AFC) method and apparatus |
Jun. 26, 2007 |
| 7233632 |
Symbol timing correction for a phase modulated signal with mutually interfering symbols |
Jun. 19, 2007 |
| 7233635 |
Apparatus and method for digital symbol synchronization |
Jun. 19, 2007 |
| 7224755 |
Method and apparatus for generating a frequency control signal |
May. 29, 2007 |
| 7224722 |
Direct conversion RF transceiver with automatic frequency control |
May. 29, 2007 |
| 7224754 |
Frequency offset compensation estimation system and method for a wireless local area network |
May. 29, 2007 |
| 7221721 |
Frequency offset calculation method using log transforms and linear approximation |
May. 22, 2007 |
| 7218691 |
Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset |
May. 15, 2007 |
| 7212587 |
Apparatus for reducing DC offset in a receiver |
May. 1, 2007 |
| 7203252 |
Minimum variance unbiased and moment estimators of carrier frequency offset in multi-carrier systems |
Apr. 10, 2007 |
| 7200188 |
Method and apparatus for frequency offset compensation |
Apr. 3, 2007 |
| 7194046 |
Frequency error correction unit and method in a wireless LAN system |
Mar. 20, 2007 |
| 7190753 |
Method and apparatus for temporally correcting a data signal |
Mar. 13, 2007 |
| 7190747 |
Frequency mismatch compensation for multiuser detection |
Mar. 13, 2007 |
| 7190940 |
Method and system for frequency offset estimation |
Mar. 13, 2007 |
| 7187731 |
Precise frequency estimation of short data bursts |
Mar. 6, 2007 |
| 7187732 |
Start-up automatic frequency control (AFC) method and apparatus |
Mar. 6, 2007 |
| 7173983 |
COFDM demodulator with FFT analysis window displacement compensation |
Feb. 6, 2007 |
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