Code-division multiple-access system with improved utilization o

Details Code-division multiple-access system with improved utilization o Code-division multiple-access system with improved utilization o

1995-03-09

1996-07-02

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 21, 375208, 381 29, 381 35, 455 541, H04B 169

Patent

active

055330126

ABSTRACT:
A code-division multiple-access system has a downstream channel for transmission from a base station to a number of mobile stations, and an upstream channel for transmission from the mobile stations to the base station. On the downstream channel, each mobile station's spreading code is divided into two parts, which modulate data transmitted on in-phase and quadrature carriers, respectively, thereby enabling the length of the spreading code to be doubled without increasing the chip rate. On the upstream channel, as soon as a symbol is received from one mobile station, it is despread to estimate its value, then respread and canceled as interference with respect to the other mobile stations, these processes being iterated in a cyclic order of the mobile stations.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen
patent: 5224122 (1993-06-01), Bruckert
patent: 5329547 (1994-07-01), Ling
patent: 5345472 (1994-09-01), Lee
patent: 5394434 (1995-02-01), Kawabe et al.
patent: 5414699 (1995-05-01), Lee
patent: 5463660 (1995-10-01), Fukasawa et al.
Sklar, "Digital Communications", Prentice Hall, 1988, pp. 571-573.
Goodman et al, "A Robust Adaptive Quantizer", IEEE Transactions on Cummunications, Nov. 1975, pp. 1362-1365.

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