Efficient spreader for spread spectrum communication systems

Details Efficient spreader for spread spectrum communication systems Efficient spreader for spread spectrum communication systems

2005-04-26

2005-04-26

Ha, Dac V. (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S146000, C375S343000, C370S320000, C370S342000, C370S441000, C370S479000

Reexamination Certificate

active

06885692

ABSTRACT:
A spreading system and method for CDMA applications that requires fewer integer multiplications. User data is spread using real or complex integer based spreading codes of length SF to SFmaxchips. At least one of the codes is of the form jn·ν[n] where ν[n] is a spreading code. The invention provides increased user separation using a plurality of spreading codes.

REFERENCES:
patent: 6031865 (2000-02-01), Kelton et al.
patent: 6097714 (2000-08-01), Nagatani et al.
patent: 6151328 (2000-11-01), Kwon et al.
patent: 6512737 (2003-01-01), Agee
patent: 2300545 (1996-11-01), None
patent: 10190625 (1998-07-01), None
Kevin Laird, Nick Whinnett & Soodesh Buljore, “A Peak-To-Average Power Reduction Method for Third Generation CDMA Reverse Links”, 1999 IEEE 49th Vehicular Technology Conference, Houston, TX, USA, May 16-20, 1999.

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