Apparatus for multipath DSSS communications

Details Apparatus for multipath DSSS communications Apparatus for multipath DSSS communications

1992-12-31

1994-09-20

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 455 10, 455 521, 455 63, 455 65, 455 673, H04L 2730, H04B 110

Patent

active

053496060

ABSTRACT:
Circuit for recovery of a plurality of multipath direct sequence spread spectrum signal components received over a time span, wherein the multipath signal components are components of a signal generated from digital data comprised of data bits at a data bit rate modulated by a pseudo-noise code, consisting of a sequence of chips having a chip rate greater than the data bit rate, wherein the sequence of chips is a code repetition period equal or greater than the received time span of the multipath signal components. A plurality of correlators is provided. Each correlator has a first input for coupling to the multipath signal components, a second input, and an output. A pseudo-noise code generator generates a duplicate of the pseudo-noise code. A time delayer is coupled between the second inputs of a mulitiplicity of the correlators and the pseudo-noise code generator for delaying the duplicate of the pseudo-noise code by a multiple of a time delay equal to the time of a chip duration or less. A signal combiner is coupled to the plurality of phase correcting devices.

REFERENCES:
patent: 3760167 (1973-09-01), Schrimshaw
patent: 4669091 (1987-05-01), Nossen
patent: 5157695 (1992-10-01), Westerfield et al.
patent: 5164964 (1992-11-01), Kubo

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