Correlator for DSSS communications

Details Correlator for DSSS communications Correlator for DSSS communications

1992-12-31

1994-05-24

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, H04L 2730

Patent

active

053156161

ABSTRACT:
A correlator for processing a direct sequence spread spectrum communication system signal, wherein digital data comprised of data bits at a data bit rate is modulated by a first pseudo-noise code comprised of a sequence of chips having a pseudo-noise chip rate greater than the data bit rate, each chip having a chip period, the sequence repeating at a code period, and the pseudo-noise modulated data modulates a carrier resulting in the signal. A sampler produces digital samples of the signal. A pseudo-noise code generator produces a second pseudo-noise code replicating the first pseudo-noise code. Circuity time syncronizes the second pseudo-noise code to maximize a combined value of correlated signal energy, thereby time locking the first pseudo-noise code and the second pseudo-noise code.

REFERENCES:
patent: 4209834 (1980-06-01), Rabow
patent: 4707839 (1987-11-01), Andren et al.
patent: 4730340 (1988-03-01), Frazier, Jr.
patent: 5204875 (1993-04-01), Mower et al.

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