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Class Information
Number: 370/478
Name: Multiplex communications > Communication techniques for information carried in plural channels > Combined time division and frequency division
Description: Subject matter wherein information signals are combined or distributed via both time and frequency channels.

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
6587453 Method of communicating first and second data types Jul. 1, 2003
6580752 Alternative configurations for an ADSL system operating in a time duplex noise environment Jun. 17, 2003
6552832 Telecommunications system including transmultiplexer installed between digital switch and optical signal transmission fiber Apr. 22, 2003
6545997 Transmission method and transmission apparatus for transmitting signals on the basis of a OFDM/TDMA-system with pilot symbols Apr. 8, 2003
6539008 Method for inserting power control bits in the CDMA mobile system Mar. 25, 2003
6532223 Communication method, transmission method, reception method, base station and terminal Mar. 11, 2003
6529488 Multiple frequency allocation radio frequency device and method Mar. 4, 2003
6515960 Radio communication system Feb. 4, 2003
6490262 Interference in a cellular communications system Dec. 3, 2002
6487219 Multi-band receiver having multi-slot capability Nov. 26, 2002
6449262 Method and apparatus for frequency shifting with a clock signal Sep. 10, 2002
6385189 Method and apparatus for compressing and transmitting high speed data May. 7, 2002
6377562 Wireless asymmetric local loop (WASL) communication Apr. 23, 2002
6366568 Transfer station for wireless telephone distribution system with time and space diversity transmission Apr. 2, 2002
6356555 Apparatus and method for digital data transmission using orthogonal codes Mar. 12, 2002
6356540 Method for allocating frequency carrier in cellular system Mar. 12, 2002
6323804 Method and apparatus for GPS time determination Nov. 27, 2001
6278686 Construction of a multicarrier signal Aug. 21, 2001
6275506 Radio transmission method for digital multimedia data signals between subscriber stations in a local network Aug. 14, 2001
6266347 System and method for modifying symbol duration for the efficient transmission of information in a time duplex noise environment Jul. 24, 2001
6256508 Simultaneous broadcasting system, transmitter and receiver therefor Jul. 3, 2001
6246498 System and method for free space optical communications using time division multiplexing of digital communication signals Jun. 12, 2001
6243397 Multi-carrier PC-CDMA system Jun. 5, 2001
6236662 Multirate time reservation multi-access protocol May. 22, 2001
6223048 Method of generating a frequency-hopping sequence for radio communication, as well as radio facility and radio communication system therefor Apr. 24, 2001
6212221 Communication apparatus Apr. 3, 2001
6181686 Automatic data transfer mode control Jan. 30, 2001
6178175 Circuit array and method for creating a data feedback channel from receiver to transmitter in a common frequency network Jan. 23, 2001
6144292 Powerline communications network employing TDMA, FDMA and/or CDMA Nov. 7, 2000
6130897 Time division multiple access FDD/TDD dual mode radio and a time division multiple access TDD dual band system Oct. 10, 2000
6128282 Network node controller and method for combining circuit and packet data Oct. 3, 2000
6078609 Radio communication system using frequency hopping, and method of controlling same Jun. 20, 2000
6072802 Initial synchronization method in code division multiple access reception system Jun. 6, 2000
6072769 Method for multitone division multiple access communications Jun. 6, 2000
6064663 Cellular CDMA data link utilizing multiplexed channels for data rate increase May. 16, 2000
6061405 Time domain source matched multicarrier quadrature amplitude modulation (QAM) method and apparatus May. 9, 2000
6047023 Swept frequency modulation and demodulation technique Apr. 4, 2000
6035182 Single counter dual modulus frequency division apparatus Mar. 7, 2000
6023460 Wireless communications system and method using a reusable control channel Feb. 8, 2000
6018528 System and method for optimizing spectral efficiency using time-frequency-code slicing Jan. 25, 2000
6011786 Systems and methods for control channel communication in cellular radiotelephone systems Jan. 4, 2000
6009084 Concentrating transmultiplexer for cable telephony Dec. 28, 1999
5963557 High capacity reservation multiple access network with multiple shared unidirectional paths Oct. 5, 1999
5956326 System and method for frequency division duplex/time division duplex radio frequency communication Sep. 21, 1999
5920571 Frequency channel and time slot assignments in broadband access networks Jul. 6, 1999
5889766 Transmission/reception method based on frequency division multiple access having changeable communication channel bandwidths and communication apparatus employing the method Mar. 30, 1999
5870402 Multiple user digital receiver apparatus and method with time division multiplexing Feb. 9, 1999
5867487 Method of automatic duplex or semi-duplex communication for two units via a telephone line Feb. 2, 1999
5850390 Method for managing radio resources which transmits user data/information field within a time/frequency parallelogram separated from the header channel by a plurality of frequencies Dec. 15, 1998
5848105 GMSK signal processors for improved communications capacity and quality Dec. 8, 1998

1 2 3 4 5 6 7 8

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