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Class Information
Number: 455/43
Name: Telecommunications > Transmitter and receiver at separate stations > Frequency or phase modulation > With modification of frequencies of analog signal passed (e.g., pre-emphasis and de-emphasis)
Description: Subject matter where the information or modulating signal is predistorted and/or preamplified prior to its modulation of the carrier wave.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8654891 Peak suppressing apparatus, peak suppressing method and wireless communications apparatus Feb. 18, 2014
8532575 System, method and apparatus for inter-vehicle communication Sep. 10, 2013
8509370 Phase locked loop device and method thereof Aug. 13, 2013
8401477 System, method and apparatus for communicating with vehicle occupants Mar. 19, 2013
8315303 Phase pre-emphasis for a serial data transmitter Nov. 20, 2012
8244192 System and method for wireless communication of magnetic resonance data Aug. 14, 2012
8200158 System, method and apparatus for communicating with vehicle occupants Jun. 12, 2012
8160119 Method and device for anti-interference fighting in a telecommunications system Apr. 17, 2012
8150324 Method and system for clipping a baseband input signal Apr. 3, 2012
8018914 Radio communication device, demodulation method, and frequency deflection correction circuit Sep. 13, 2011
8018985 CDMA receivers for the golden code Sep. 13, 2011
7986723 Delay estimation apparatus and method Jul. 26, 2011
7921183 Communication system, storage device, and control device for accessing external file data on a page unit or sector unit basis Apr. 5, 2011
7869494 Equalizer circuitry for mitigating pre-cursor and post-cursor intersymbol interference Jan. 11, 2011
7680465 Sound enhancement for audio devices based on user-specific audio processing parameters Mar. 16, 2010
7639762 Method for receiving and recovering frequency shift keyed symbols Dec. 29, 2009
7586975 Code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system Sep. 8, 2009
7551897 Method and apparatus for performing transmit pre-emphasis Jun. 23, 2009
7526043 High speed line equalizer and method thereof Apr. 28, 2009
7376173 Unambiguously encoding and decoding signals for wireless channels May. 20, 2008
7324798 2.sup.N-order sub-harmonic frequency modulator having high carrier suppression ratio and direct conversion transmitter using the same Jan. 29, 2008
7321785 Eyeglasses with wireless audio capability Jan. 22, 2008
7308104 Forward multiple scrambling code generating method and apparatus Dec. 11, 2007
7231266 Digital control device and program Jun. 12, 2007
7225135 Signal-predictive audio transmission system May. 29, 2007
7224739 Controlled frequency signals May. 29, 2007
7206337 Bit stream conditioning circuit having output pre-emphasis Apr. 17, 2007
7155164 Method and apparatus for performing transmit pre-emphasis Dec. 26, 2006
7144290 Discharge lamp with stabilized discharge vessel plate Dec. 5, 2006
7123665 Method and apparatus for measuring phase error of a modulated signal Oct. 17, 2006
7085327 Phasor fragmentation circuitry and method for processing modulated signals having non-constant envelopes Aug. 1, 2006
7068984 Systems and methods for amplification of a communication signal Jun. 27, 2006
7023897 Transmission circuit Apr. 4, 2006
7010050 Signaling over noisy channels Mar. 7, 2006
6980593 Wireless transmission-reception system Dec. 27, 2005
6882871 Transfer connection device for wirelessly connecting mobile phone and hand-free handset Apr. 19, 2005
6834184 Method for supplying reference data for a frequency update in a mobile station, mobile station, module of a mobile station and radio communications system Dec. 21, 2004
6771708 Nonlinear compensator Aug. 3, 2004
6735264 Compensation for non-linear distortion in a modem receiver May. 11, 2004
6567988 Video signal transmission apparatus and video signal transmission method May. 20, 2003
6487240 Apparatus for receiving and recovering frequency shift keyed symbols Nov. 26, 2002
6477182 Data transmission method and apparatus Nov. 5, 2002
6434241 Controlling the peak levels of the FM composite signal by half-cosine interpolation Aug. 13, 2002
6195537 Method and apparatus for strong signal suppression in multi-carrier signals Feb. 27, 2001
6038430 Method and apparatus for improving transmission of data in a wireless network Mar. 14, 2000
5913152 FM composite signal processor Jun. 15, 1999
5907584 System and method for transmitting and receiving a Lincompex signal having information encoded thereon through angle modulation May. 25, 1999
5878077 Apparatus for high-speed simultaneous voice/data communications Mar. 2, 1999
5729828 Frequency processing circuit with lower sideband suppression and emphasis Mar. 17, 1998
5666659 Method of and structure for increasing signal power over cellular link Sep. 9, 1997

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