Velocity Discrimination Radar.
Patent, Filed 30 Apr 75, patented 29 Sep 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A radar method and apparatus which utilizes a first frequency signal modulated by a first modulating signal and a second frequency signal modulated by a second modulating signal, the first and second frequencies being different and the first and second modulating waveforms having different periods of repetition. The radar receiver separates the return radar signal into the component due to the first frequency signal and the component due to the second frequency signal. Both components are then heterodyned with their respective frequency signals. Each modulating waveform is subjected to a plurality of delays and each component is subsequently correlated with each of its respective delayed modulating waveforms. A target is recognized when the correlated first frequency component exceeds a predetermined threshold and simultaneously the correlated second frequency component exceeds a predetermined threshold.
- Active and Passive Radar Detection and Equipment