Method for efficient sampling in a correlator

Details Method for efficient sampling in a correlator Method for efficient sampling in a correlator

1997-06-26

1999-11-09

Pham, Chi H.

Pulse or digital communications

Repeaters

Testing

375200, 375343, 342352, H04B 1500, H03D 100, H03B 7185

Patent

active

059828110

ABSTRACT:
A direct sequence spread spectrum receiver samples an incoming signal at a low non-integer sample rate relative to the input data rate. The sample rate is an integer rate relative to a defined data segment. As multiple segments are sampled, the non-integer sample rate causes bit/chip samples to process relative to the incoming data. Because the sample rate is an integer relative to a data segment, the samples are substantially stationary relative to each segment. Such a method is useful in global positioning satellite (GPS) signal processing wherein the time to first fix is minimized by having to correlate fewer sample points in the acquisition process.

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patent: 4998111 (1991-03-01), Ma et al.
patent: 5420593 (1995-05-01), Niles
patent: 5425058 (1995-06-01), Mui
patent: 5457713 (1995-10-01), Sanderford, Jr. et al.
patent: 5663734 (1997-09-01), Krasner

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