Method and apparatus for time aligning signals for reception in

Details Method and apparatus for time aligning signals for reception in Method and apparatus for time aligning signals for reception in

1993-11-30

1995-08-29

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701001, 455 511, H04J 1300, H04J 306

Patent

active

054467276

ABSTRACT:
A coherent reverse channel, a per-chip spreading function, orthogonal spreading functions and a time alignment of all traffic channels are implemented such that the main signal of each channel arrives at a base-station within a fraction of a chip of one another in accordance with the invention. With this, the orthogonality among all channels is maintained, and, when demodulated, all channels except the channel of interest provides a cross-correlation of substantially zero with respect to the remaining signals.

REFERENCES:
patent: 4688210 (1987-08-01), Eizenhofer et al.
patent: 4893318 (1990-01-01), Potash et al.
patent: 5164958 (1992-11-01), Omura
patent: 5257404 (1993-10-01), Goreham et al.
patent: 5317571 (1994-05-01), Marcel et al.
Kajiwara, Akihiro, "On Synchronous CDMA for Mobile Communications", Department of Systems & Computer Engineering, Carleton University, Ottawa, Canada, K1S 5B6, 1992 IEEE, pp. 858-862.

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