System for spread spectrum communication

Details System for spread spectrum communication System for spread spectrum communication

2005-07-26

2005-07-26

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S140000, C375S150000, C370S320000

Reexamination Certificate

active

06922432

ABSTRACT:
A signaling system is provided in which a spread spectrum code is cyclically shifted by a cyclical shift dictated by a bit pattern of one or more bits. The cyclically shifted spread spectrum code is used to modulate a carrier frequency, and transmitted from a transmitter to a receiver. At the receiver the signal including the cyclically shifted spectrum code is demodulated to recover the cyclically shifted code. The cyclical shift is then determined and the bit pattern which is associated with the cyclical shift is output. The method can be used in direct sequence spread spectrum communication.

REFERENCES:
patent: 5748623 (1998-05-01), Sawahashi et al.
patent: 5852630 (1998-12-01), Langberg et al.
patent: 6108317 (2000-08-01), Jones et al.
patent: 6519275 (2003-02-01), Callaway et al.
patent: 6738413 (2004-05-01), Karino

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