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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:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Patent Number Title Of Patent Date Issued
7620125 Frequency estimation apparatus and related method Nov. 17, 2009
7616935 Method and apparatus for matching receiver carrier frequency Nov. 10, 2009
7600167 Flip-flop, shift register, and scan test circuit Oct. 6, 2009
7599453 Doppler spread estimation for OFDM systems Oct. 6, 2009
7596190 System, method, and apparatus for correction of code doppler shift Sep. 29, 2009
7593358 Transmission device for remote control systems Sep. 22, 2009
7593491 Quadrature single-mixer multi-mode radio frequency receiver Sep. 22, 2009
7587003 Method and device for carrier-frequency synchronization of a vestigial-sideband-modulated signal Sep. 8, 2009
7583773 Frequency synthesizing device with automatic calibration Sep. 1, 2009
7583770 Multiplex signal error correction method and device Sep. 1, 2009
7580684 Programmable radio transceiver Aug. 25, 2009
7580486 Multi-input multi-frequency synthesizing apparatus and method for multi-band RF receiver Aug. 25, 2009
7580483 Trimming of local oscillation in an integrated circuit radio Aug. 25, 2009
7580468 Synchronization circuits, orthogonal frequency division multiplexing (OFDM) receivers, and related methods and computer program products Aug. 25, 2009
7580390 Reducing handover frequency error Aug. 25, 2009
7577214 OFDM signal receiver and receiving method Aug. 18, 2009
7577216 Guard interval and FFT mode detector in DVB-T receiver Aug. 18, 2009
7577219 Apparatus for communications Aug. 18, 2009
7570722 Carrier frequency offset estimation for OFDM systems Aug. 4, 2009
7567640 Phase offset tracking method for tracking a phase offset and device thereof Jul. 28, 2009
7567131 Device for ultra wide band frequency generating Jul. 28, 2009
7558340 VSB receiver and carrier recovery apparatus thereof Jul. 7, 2009
7558346 Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof Jul. 7, 2009
7555073 Automatic frequency control loop circuit Jun. 30, 2009
7551696 Method and apparatus of detecting ISI/ICSI in an OFDM system Jun. 23, 2009
7545870 Reception device Jun. 9, 2009
7545891 Carrier recovery architectures for multi input multi output orthogonal frequency division multiplexing receivers Jun. 9, 2009
7541884 Methods and apparatus for crystal oscillator drift estimation and compensation Jun. 2, 2009
7541966 Apparatus and method for demodulating a modulated signal Jun. 2, 2009
7535982 Method and apparatus for adjusting phase of sampling frequency of ADC May. 19, 2009
7535976 Apparatus and method for integration of tuner functions in a digital receiver May. 19, 2009
7532667 Pilot-directed and pilot/data-directed equalizers May. 12, 2009
7532693 Method and apparatus for acquistion and tracking of orthogonal frequency division multiplexing symbol timing, carrier frequency offset and phase noise May. 12, 2009
7529325 Voice and data exchange over a packet based network with timing recovery May. 5, 2009
7529326 Precise frequency estimation of short data bursts May. 5, 2009
7526013 Tag communications with access point Apr. 28, 2009
7522691 Phase-locked circuit Apr. 21, 2009
7519140 Automatic frequency correction PLL circuit Apr. 14, 2009
RE40695 Clock phase detecting circuit and clock regenerating circuit each arranged in receiving unit of multiplex radio equipment Apr. 7, 2009
7515657 Frequency tracking for OFDM transmission over frequency selective channels Apr. 7, 2009
7515653 Digital broadcasting receiver, driving method thereof, and self-diagnosis method thereof Apr. 7, 2009
7512195 Frequency control apparatus, wireless communication apparatus and frequency control method Mar. 31, 2009
7508888 Method and apparatus for precise open loop tuning of reference frequency within a wireless device Mar. 24, 2009
7509104 Method and apparatus for tuning radio frequency Mar. 24, 2009
7509108 Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence Mar. 24, 2009
7502602 Method and apparatus to compensate loop error of phase locked loop Mar. 10, 2009
7499507 Synchronization module using a Viterbi slicer for a turbo decoder Mar. 3, 2009
7496160 Frequency offset detection processing system and frequency offset detection processing method using the same Feb. 24, 2009
7496161 Adaptive equalization system for a signal receiver Feb. 24, 2009
7489660 Circuit for preventing signal quality degradation in CDMA system and method thereof Feb. 10, 2009

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