Spread spectrum communication system

Details Spread spectrum communication system Spread spectrum communication system

H - Electricity

04

K

H04K 1/02 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2103304

ABSTRACT "Spread spectrum communication system" Apparatus for generating a pseudo-noise (PN) code sequence with a relatively short repeatable code length, to facilitate signal acquisition in a receiver, but also having a spectrum that is practically indistinguishable from electromagnetic noise. A primary PN code sequence of relatively short length is combined with a secondary random or pseudo-random code sequence having a chip rate approximately equal to the code repetition rate of the primary PN code, to produce a composite code. When the composite code is used to modulate a carrier signal, the resulting frequency spectrum is similar to noise, but retains the short code property of ease of signal acquisition.

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