Code division multiple access (CDMA) inbound messaging system ut

Details Code division multiple access (CDMA) inbound messaging system ut Code division multiple access (CDMA) inbound messaging system ut

1994-11-14

1998-06-02

Tse, Young T.

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370342, 375200, 375208, H04J 1302, H04L 2730

Patent

active

057611963

ABSTRACT:
A central controller (10) controls the operation of a code division multiple access (CDMA), spread spectrum communication system, which includes base stations (15) and portable transceivers (20) for communicating with the base stations (15). The central controller (10) stores a plurality of seeds, which are used by the portable transceivers (20) in generating pseudo-noise (PN) sequences, and, in response to requests from base stations (15), the central controller (10) distributes at least a portion of the assignable seeds to each of the requesting base stations (15). The base stations (15) that have received seeds from the central controller (10) subsequently transmit the seeds over the air to the portable transceivers (20) within their respective coverage areas. The portable transceivers (20) then utilize the seeds to generate spread spectrum signals for reception by a closest base station (15) having a coverage area in which they are located.

REFERENCES:
patent: 4882579 (1989-11-01), Siwiak
patent: 4891637 (1990-01-01), Siwiak et al.
patent: 4918437 (1990-04-01), Jasinski et al.
patent: 4968966 (1990-11-01), Jasinski et al.
patent: 5005014 (1991-04-01), Jasinski
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5105435 (1992-04-01), Stilwell
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5212808 (1993-05-01), Su et al.
patent: 5247702 (1993-09-01), Su et al.
patent: 5258995 (1993-11-01), Su et al.
patent: 5267244 (1993-11-01), Messerschmitt et al.
"Near-Far Resistance of Multiuser Detectors in Asynchronous Channels", by Lupas et al., published Apr., 1990, by IEEE Transactions on Communications, vol. 38, No. 4, pp. 496-508.
"Optimally Near-Far Resistant Multiuser Detection in Differentially Coherent Synchronous Channels", by Varanasi et al., published by IEEE Transactions on Information Theory, vol. 37, No. 4, pp. 1006-1018, Jul. 1991.

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