Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 375/337
Name: Pulse or digital communications > Receivers > Angle modulation > Frequency shift keying > Separate mark and space channels
Description: Subject matter in which one frequency is received over one channel and the other frequency is received over another separate channel within the receiver.

Patents under this class:

Patent Number Title Of Patent Date Issued
8625639 Information processing apparatus and signal transmission method Jan. 7, 2014
8340208 Information processing device and signal processing method Dec. 25, 2012
8265199 Receiving circuit Sep. 11, 2012
8238482 Techniques for improving channel estimation and tracking in a wireless communication system Aug. 7, 2012
8060051 Radio communication apparatus and frequency offset calculation method Nov. 15, 2011
8050343 Wireless communication methods and receivers for receiving and processing multiple component carrier signals Nov. 1, 2011
7974373 Method and architecture for digital pulse shaping and rate conversion Jul. 5, 2011
7688799 Mobile terminal, wireless relay apparatus, and mobile communication system Mar. 30, 2010
7221711 Multilevel data encoding and modulation technique May. 22, 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
6782353 Instrument for measuring characteristic of data transmission system with high accuracy and clock reproducing circuit used therefor Aug. 24, 2004
6707858 Low IF receiver Mar. 16, 2004
6430218 Communication control apparatus Aug. 6, 2002
5351273 Process and system for the transmission of a signal Sep. 27, 1994
5214641 Mixed analog digital secondary channel FSK modem May. 25, 1993
5081644 Spread spectrum receiving device Jan. 14, 1992
5065409 FSK discriminator Nov. 12, 1991
4935940 Interference-proof reception of radio signals using frequency hopping techniques Jun. 19, 1990
4825452 Digital FSK demodulator Apr. 25, 1989
4814717 FSK frequency discriminator for a coherent optical transmission system Mar. 21, 1989
4759080 Coherent optical communication system with FSK heterodyne or homodyne detection and little influence by distortion of a modulated optical signal Jul. 19, 1988
4726041 Digital filter switch for data receiver Feb. 16, 1988
4715045 System protocol for composite shift keying communication system Dec. 22, 1987
4577333 Composite shift keying communication system Mar. 18, 1986
4568882 Digital FSK demodulator circuit Feb. 4, 1986
4543547 Demodulation filter for a signal modulated in binary frequency manner Sep. 24, 1985
4523324 Direct modulation FM data receiver Jun. 11, 1985
4498198 Binary signal decoding apparatus and method Feb. 5, 1985
4464756 System for error detection in frequency shift keyed signals Aug. 7, 1984
4459474 Identification system with separation and direction capability and improved noise rejection Jul. 10, 1984
4409593 Threshold-less collision detection and bit arbitration in a CFSK data system Oct. 11, 1983
4355407 Device for disconnecting the receiver in case of a small signal-to-noise ratio for a digital-modulated radio system Oct. 19, 1982
4333150 Signal receiving apparatus and method Jun. 1, 1982
4291275 Frequency demodulation system Sep. 22, 1981
4290140 Combined coherent frequency and phase shift keying modulation system Sep. 15, 1981
4254503 Radio receiver for tone modulated signals Mar. 3, 1981
4247943 Piecewise coherent, combined frequency and phase-shift-keyed signal demodulator Jan. 27, 1981
4234852 Coherent frequency shift key demodulator Nov. 18, 1980
4156194 Frequency-shift-keyed receiver May. 22, 1979
4054842 Channel gain imbalance compensation for FSK demodulator Oct. 18, 1977
4011511 Frequency-shift digital data link and digital frequency detection system Mar. 8, 1977
3947769 Threshold correction system in FSK transmissions Mar. 30, 1976

  Recently Added Patents
Inter-carrier communications for multimedia-message delivery
Systems and methods for providing a collaboration place interface including data that is persistent after a client is longer in the collaboration place among a plurality of clients
Picture quality control method and image display using same
Systems and methods for implementing multi-application tabs and tab sets
Maize hybrid X95C382
System and method for optimizing teams
  Randomly Featured Patents
Device for needling a fibrous web
Image sensor package and image capture device with same
System and method for media burst control of discrete content for push-to-cellular communication
Semiconductor integrated circuit
Optical recording and reproducing method optical recording and reproducing device, and optical recording medium
Apparatus as tuning filter
Armature winding of rotating electrical machine
Device and method for transcutaneous determination of blood gases
Method of making a semiconductor device
Process for preparing alkali metal 3-sulfobenzoates