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Browse by Category: Main > Communications
Class Information
Number: 375/335
Name: Pulse or digital communications > Receivers > Angle modulation > Frequency shift keying > More than two frequencies
Description: Subject matter in which the input signal detected has three or more frequencies representing three or more pieces of information.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8660215 Decoding algorithm for frequency shift key communications Feb. 25, 2014
8649416 Signal processing apparatus, information processing apparatus, signal processing method, data display method, and program Feb. 11, 2014
8593325 Successive approximation analog-to-digital conversion Nov. 26, 2013
8594138 Methods for in-band signaling through enhanced variable-rate codecs Nov. 26, 2013
8493963 Multiple time accurate strobe (TAS) messaging Jul. 23, 2013
8462899 Multi-user detecting method and device of OFDM transmission signal Jun. 11, 2013
8447253 Radio communication system May. 21, 2013
8422573 Transmitting device Apr. 16, 2013
RE44109 Method for effectively transmitting synchronization channel and method for allocating transmission power for the same Mar. 26, 2013
8284090 Method and apparatus for analog to digital conversion of small signals in the presence of a large DC offset Oct. 9, 2012
8265123 CDMA receiving apparatus and CDMA receiving method Sep. 11, 2012
8254500 Channel equalization with SCDMA modulation Aug. 28, 2012
8199859 Integrating receiver with precharge circuitry Jun. 12, 2012
8170149 OFDM receiver apparatus May. 1, 2012
8126089 Method and apparatus for providing frame synchronization in a digital communication system that supports multiple modulation formats Feb. 28, 2012
8102899 Receiver and method of receiving a CDMA signal in presence of interferences with unknown spreading factors Jan. 24, 2012
8094697 Method and device for the demodulation of satellite radio navigation signals Jan. 10, 2012
8085066 xCP on 2 CSI Dec. 27, 2011
8054916 Method for using a base station to selectively utilize B and D channels to support a plurality of communications Nov. 8, 2011
8050704 Method for effectively transmitting synchronization channel and method for allocating transmission power for the same Nov. 1, 2011
8032100 System and method of communicating multiple carrier waves Oct. 4, 2011
7983310 Methods for in-band signaling through enhanced variable-rate codecs Jul. 19, 2011
7953059 Apparatus and method for detecting feedback information in a wireless communication system May. 31, 2011
7899127 Method and device for reducing the crest factor of a signal Mar. 1, 2011
7864899 Synchronization Jan. 4, 2011
7860189 Hybrid heterodyne transmitters and receivers Dec. 28, 2010
7822104 Averaging a delay profile in a limited delay range Oct. 26, 2010
7809089 Decorrelating discrimination system of code division multiple access signals Oct. 5, 2010
7809088 Multiphase receiver with equalization Oct. 5, 2010
7804891 Device and method for judging communication quality and program used for the judgment Sep. 28, 2010
7773946 Method and apparatus for transmitting/receiving data in a cellular communication system Aug. 10, 2010
7773678 Method and apparatus for reducing the dynamic range of a radio signal Aug. 10, 2010
7702036 Data sequence detection in communication system Apr. 20, 2010
7680224 Apparatus and method for automatic frequency correction for a receiver system Mar. 16, 2010
7653164 Adaptive IQ imbalance correction for multicarrier wireless communication systems Jan. 26, 2010
7643582 Method and system for determining symbol boundary timing in a multicarrier data transmission system Jan. 5, 2010
7609785 Mitigation of interference in cell search by wireless transmit and receive units Oct. 27, 2009
7573942 Method for encoding and decoding control information in a wireless communications system Aug. 11, 2009
7508890 Apparatus and method for FSK demodulation with integrated time and frequency tracking Mar. 24, 2009
7480349 Low IF receiver systems and methods Jan. 20, 2009
7460618 System and method for obtaining accurate symbol rate and carrier phase, frequency, and timing acquisition for minimum shift keyed waveform Dec. 2, 2008
7400904 Dual mode AM-FM receiver with I-Q decoding, such as for utility data collection Jul. 15, 2008
7257408 Radio communication system and transmission mode selecting method Aug. 14, 2007
7231003 System and method for aligning data between local and remote sources thereof Jun. 12, 2007
7184493 Pulse sorting apparatus for frequency histogramming in a radar receiver system Feb. 27, 2007
7158588 System and method for obtaining accurate symbol rate and carrier phase, frequency, and timing acquisition for minimum shift keyed waveform Jan. 2, 2007
7072414 Gaussian minimum shift keying (GMSK) precoding communication method Jul. 4, 2006
7068169 Use of a subcarrier in an organic semiconductor radio frequency identification system Jun. 27, 2006
7035312 Pilot signal cycling technique for a control system that reduces distortion produced by electrical circuits Apr. 25, 2006
7003047 Tri-state integer cycle modulation Feb. 21, 2006

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