Nova Patents
EP0809364A3

Spread spectrum communication system

Abstract

Low rate data D1-D4 and middle rate data D5 and D6 are time division multiplexed independently according to their rates by a time division multiplexer TDM(A) (110) so that their rates are converted into the rate of high rate data D7 and D8 which are not passed through the time division multiplexer TDM(A) (110). Subsequently, the entire data are converted into biorthogonal signals by biorthogonal signal generators BORTs (121, 122a-125a), and code division multiplexed by a code division multiplexer CDM(A) (130a). The code division multiplexed signal undergoes modulation by a spreading modulator (20) and a carrier modulator (30), and transmitted.

Term

Term ended

Projected expiry passed 6 February 2017, 9.6 years ago.

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Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
EP0565506A2CitesEuropean Patent Office (EPO)ASearch report1-11
EIZENHOEFER A: "ANWENDUNG DER SPREAD-SPECTRUM-TECHNIK IN DEM HYBRIDEN MOBILFUNKSYSTEM MATS-D", FREQUENZ, SCHIELE UND SCHON GMBH. BERLIN, DE, vol. 40, no. 9/10, September 1986 (1986-09-01), pages 255 - 259, XP000796858, ISSN: 0016-1136Non-patent––Search report–
AZAD H ET AL: "MULTIRATE SPREAD SPECTRUM DIRECT SEQUENCE CDMA TECHNIQUES", IEE COLLOQUIUM ON SPREAD SPECTRUM TECHNIQUES FOR RADIO COMMUNICATIONS SYSTEMS, IEE, LONDON, GB, 15 April 1994 (1994-04-15), pages 4 - 1-4-5, XP000570787Non-patent––Search report–
WOODWORTH C B ET AL: "SPECTRALLY EFFICIENT UNIVERSAL TIME SLOTS USING TIME-FREQUENCY-CODESLICING", WIRELESS NETWORKS. CATCHING THE MOBILE FUTURE. IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS AND ICCC REGIONAL MEETING ON WIRELESS COMPUTER NETWORKS, XX, XX, vol. 3, 1994, pages 1009 - 1013, XP000892997Non-patent––Search report–