Method employed by a remote terminal for spread spectrum...

Details Method employed by a remote terminal for spread spectrum... Method employed by a remote terminal for spread spectrum...

2005-04-05

2005-04-05

Pham, Chi (Department: 2667)

Multiplex communications

Channel assignment techniques

Combining or distributing information via code word channels...

C370S479000

Reexamination Certificate

active

06876665

ABSTRACT:
A spread-spectrum code division multiple access interference cancellation method employed by a remote terminal reduces interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceller despreads the spread-spectrum CDMA signal as a plurality of despread signals, respectively. A timed version of the plurality of chip-code signals, spread-spectrum processes the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an ithchip-code-signal, subtracting circuits subtract from the spread-spectrum CDMA signal, each of the N−1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N−1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the ithchannel of the spread-spectrum CDMA signal. The channel correlator or channel-matched filter despreads the subtracted signal.

REFERENCES:
patent: 5363403 (1994-11-01), Schilling et al.
patent: 5553062 (1996-09-01), Schilling et al.

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