Spread spectrum communication system

Details Spread spectrum communication system Spread spectrum communication system

H - Electricity

04

K

325/3

H04K 1/00 (2006.01) H04B 1/707 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2014323

ABSTRACT The spread spectrum digital communication system includes data input devices for generating digital information signals to be transmitted using radio signals. A chip stream generator converts the data bits into chip streams that are either complemented or not complemented via an exclusive-OR gate, depending on the data bits. A scrambler further randomizes the chip stream for transmission. The receiver includes a descrambler and a correlator or digital matched filter for detecting the data signal. A modified receiver includes a sampler for sampling the scrambled signal at a rate which is the multiple of the chip rate thereby eliminating any need for recovering the chip clock. Another modified version includes a receiver having means for generating multi-level signals indicating the quality of the probable detection.

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