Digital range correlator

Details Digital range correlator Digital range correlator

1990-03-19

1991-01-29

Moskowitz, Nelson

Communications: directive radio wave systems and devices (e.g.,

Determining distance

With correlation

342189, G01S 1328

Patent

active

049890093

ABSTRACT:
A digital range correlator is disclosed which provides a correlation scheme which can be mechanized and produced repeatedly with minimal need for offsets and reduced power supply sensitivity. CCDs are eliminated and the need for channel-to-channel matching is obviated. The digital correlator of the present invention includes an analog-to-digital converter for converting an input analog signal into a digital signal to provide a plurality of digital words one corresponding to each range gate. An accumulator is provided for summing the bits of each digital word to provide an accumulated sum for each range gate. The digital sums are compared in a processor to identify the range gate of the target. In a specific embodiment, the invention allows for the incorporation of a correlation code.

REFERENCES:
patent: 4237461 (1980-02-01), Cantrell et al.
patent: 4566010 (1986-01-01), Collins
patent: 4758839 (1988-07-01), Goebel et al.
patent: 4833479 (1989-05-01), Carlson

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