System for direct sequence spreading

Details System for direct sequence spreading System for direct sequence spreading

2006-02-14

2006-02-14

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S140000, C375S367000, C327S164000

Reexamination Certificate

active

06999500

ABSTRACT:
A spreading system according to an embodiment of the invention spreads two data signals. The system produces a filtered signal that is based on one of the data signals and an output signal that is based on both of the data signals. In one example, a spreading system is used to perform QPSK spreading of two data signals, including separate processing of the two data signals, in a practical manner. Such separate control may include filtering and/or gain control.

REFERENCES:
patent: 5712869 (1998-01-01), Lee et al.
patent: 5940434 (1999-08-01), Lee et al.
patent: 6052404 (2000-04-01), Tiepermann
patent: 6377539 (2002-04-01), Kang et al.

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