CW radar range measuring system

Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation

Patent

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Details

342145, 342192, 342196, G01S 1328

Patent

active

057933278

ABSTRACT:
A CW radar range measuring system having a transmitter adapted to transmit a continuous wave radar signal phase encoded in accordance with a code and a receiver adapted to receive a radar return from the transmitted radar signal. The receiver includes an analog to digital converter section for converting a sequence of samples of the radar return into a corresponding sequence of digital words. A digital correlator/integrator is fed by the digital words and the code for providing an indication of radar return energy as a function of range from the transmitter. A processor is fed by the digital correlator/integrator for determining, from the indicated energy, target range. The system includes a frequency spectrum analyzer for determining a frequency spectrum of the digital words and wherein the processor determines the target Doppler frequency from such determined frequency spectrum. In one embodiment of the invention, the digital correlator/integrator is fed the digital words and the frequency analyzer is coupled between the digital correlator/integrator and the processor. In another embodiment of the invention the frequency analyzer is fed the digital words and the digital correlator/integrator is coupled between the frequency analyzer and the processor.

REFERENCES:
patent: 4618863 (1986-10-01), Collins
patent: 4620192 (1986-10-01), Collins
patent: 5293168 (1994-03-01), Faulkner

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