Ranging systems

Details Ranging systems Ranging systems

1990-02-27

1998-03-24

Barron, Jr., Gilberto

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

Determining distance

With correlation

342120, 342162, G01S 1332

Patent

active

057317828

ABSTRACT:
A continuous wave ranging system comprises a modulator for modulating an r.f. carrier signal in accordance with a pseudo random code, a transmitting antenna for radiating the signal towards a target, a receiving antenna and receiver for detecting the signal reflected from the target, a correlator for correlating the detected signal with the transmitted code with a selected phase shift corresponding to the current range gate to be tested, whereby the range of the target from the system may be determined, and filtering means for filtering from the output of the correlator those range gate amplitudes which vary with a frequency less than a predetermined value.

REFERENCES:
patent: 3337870 (1967-08-01), Allen et al.
patent: 4012737 (1977-03-01), Waer et al.
patent: 4357610 (1982-11-01), Kingston et al.
patent: 4758839 (1988-07-01), Goebel et al.

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