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Class Information
Number: 375/272
Name: Pulse or digital communications > Systems using alternating or pulsating current > Angle modulation > Frequency shift keying
Description: Subject matter where the instantaneous frequency of the pulse or digitally modulated carrier wave is shifted (generally between two frequencies) according to the presence or absence of a pulse, or a mark or space, being transmitted.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623604 |
Suppressing interference for wireless reception and improvements relating to processing a frequency shift keyed signal |
Nov. 24, 2009 |
| 7606321 |
System and method for simplifying analog processing in a transmitter incorporating a randomization circuit |
Oct. 20, 2009 |
| 7599418 |
Method and apparatus for a frequency hopper |
Oct. 6, 2009 |
| 7532678 |
Method for transmitting data by multi-carrier modulation |
May. 12, 2009 |
| 7508890 |
Apparatus and method for FSK demodulation with integrated time and frequency tracking |
Mar. 24, 2009 |
| 7505506 |
System and method for generating single sideband, constant envelope, spread spectrum signals with multiple spreading codes |
Mar. 17, 2009 |
| 7474147 |
Frequency shift keying signal demodulator method and apparatus |
Jan. 6, 2009 |
| 7463682 |
Coding method for binary digits coding and its circuit for digits transmission |
Dec. 9, 2008 |
| 7457370 |
Frequency staggered frequency shift keying modulation |
Nov. 25, 2008 |
| 7450902 |
Continuous phase frequency shift keying modulation during wireless transmissions in a closed system while minimizing power consumption |
Nov. 11, 2008 |
| 7447277 |
Ofdm demodulation device |
Nov. 4, 2008 |
| 7436263 |
Apparatus and method for presenting a modulated output signal at an output locus |
Oct. 14, 2008 |
| 7433418 |
Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats |
Oct. 7, 2008 |
| 7421252 |
Center frequency control of an integrated phase rotator band-pass filter using VCO coarse trim bits |
Sep. 2, 2008 |
| 7394862 |
Multi-mode wireless polar transmitter architecture |
Jul. 1, 2008 |
| 7394869 |
RF transmitter architecture for continuous switching between modulation modes |
Jul. 1, 2008 |
| 7372914 |
Control system methods and apparatus for inductive communication across an isolation barrier |
May. 13, 2008 |
| RE40254 |
Method and system for realising a fast control channel in a cellular radio network |
Apr. 22, 2008 |
| 7349488 |
Frequency shift keying signaling for integrated circuits |
Mar. 25, 2008 |
| 7298788 |
Wireless communication system and method |
Nov. 20, 2007 |
| 7292645 |
Binary transmitter and method of transmitting data in binary format |
Nov. 6, 2007 |
| 7269233 |
Algorithm of bit synchronization for a digital FSK correlation receiver |
Sep. 11, 2007 |
| 7269228 |
Non-coherent frequency shift keying transmitter using a digital interpolation synthesizer |
Sep. 11, 2007 |
| 7263137 |
Multivalued FSK modulation system |
Aug. 28, 2007 |
| 7245930 |
Acquisition mechanism for a mobile satellite system |
Jul. 17, 2007 |
| 7239675 |
GFSK receiver |
Jul. 3, 2007 |
| 7123665 |
Method and apparatus for measuring phase error of a modulated signal |
Oct. 17, 2006 |
| 7088267 |
Duplex-system digital-data transmitting method and apparatus |
Aug. 8, 2006 |
| 7079814 |
Estimation of movement |
Jul. 18, 2006 |
| 7079600 |
FSK demodulator using DLL and a demodulating method |
Jul. 18, 2006 |
| 7068725 |
Bit detection threshold in a TDMA burst communication system |
Jun. 27, 2006 |
| 7058114 |
Wireless device and method |
Jun. 6, 2006 |
| 7057543 |
Low power method and interface for generating analog waveforms |
Jun. 6, 2006 |
| 7031736 |
Method and apparatus of header compression for broadcast services in radio telecommunication system |
Apr. 18, 2006 |
| 7031334 |
Method and system for realising a fast control channel in a cellular radio network |
Apr. 18, 2006 |
| 7016429 |
Training sequences for peak to average power constrained modulation formats |
Mar. 21, 2006 |
| 6993097 |
Demodulation method and demodulator for CPFSK-modulated signals |
Jan. 31, 2006 |
| 6983160 |
Base site and method for GPS-based regional time synchronization |
Jan. 3, 2006 |
| 6950670 |
Wireless network having joint power and data rate adaptation |
Sep. 27, 2005 |
| 6937666 |
Wideband digital radio with transmit modulation cancellation |
Aug. 30, 2005 |
| 6931089 |
Phase-locked loop with analog phase rotator |
Aug. 16, 2005 |
| 6901246 |
Suppressed cycle based carrier modulation using amplitude modulation |
May. 31, 2005 |
| 6891905 |
Apparatus and method for FSK demodulation with integrated time and frequency tracking |
May. 10, 2005 |
| 6865235 |
Multi-protocol modulator |
Mar. 8, 2005 |
| 6862313 |
Direct conversion spread spectrum time division duplex radio |
Mar. 1, 2005 |
| 6853687 |
Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system |
Feb. 8, 2005 |
| 6845103 |
Apparatus and method for controlling initialization of a DMT system |
Jan. 18, 2005 |
| 6842519 |
Communication with current detection |
Jan. 11, 2005 |
| 6831953 |
Method of, and a radio terminal for, detecting the presence of a 2-FSK signal |
Dec. 14, 2004 |
| 6816559 |
FSK modulation transceiver |
Nov. 9, 2004 |
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