Spread spectrum transmitter and spread spectrum receiver

Details Spread spectrum transmitter and spread spectrum receiver Spread spectrum transmitter and spread spectrum receiver

2006-08-22

2006-08-22

Ghebretinsae, Temesghen (Department: 2637)

Pulse or digital communications

Spread spectrum

C375S146000, C375S147000, C375S279000

Reexamination Certificate

active

07095778

ABSTRACT:
A spread spectrum transmitter provides delays having different magnitudes to spread spectrum (SS) signals for a plurality of channels, and multiplexes the SS signals to generate transmission multiplex SS signal. A spread spectrum receiver calculates a partial correlation value between the transmission multiplex SS signal and spreading codes multiplied to the SS signals, multiplies the partial correlation values by a prescribed matrix prepared based on each orthogonal code sequence to calculate a plurality of orthogonal correlation values. The receiver identifies for a respective channel each parallel data sequence related in advance to an orthogonal code sequence whose orthogonal correlation value is a maximum, corrects delay differences of the parallel data sequences, and then performs sampling and parallel-serial conversion to obtain a serial demodulated data sequence.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5579338 (1996-11-01), Kojima
patent: 6041074 (2000-03-01), Nakamura
patent: 6205169 (2001-03-01), Nakamura
patent: 6728298 (2004-04-01), Okubo et al.
patent: 2002/0009125 (2002-01-01), Shi
patent: 2672769 (1997-07-01), None

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