Doppler frequency analysis of radar signals

Details Doppler frequency analysis of radar signals Doppler frequency analysis of radar signals

1981-06-08

1983-08-23

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 77, G01S 900

Patent

active

044007000

ABSTRACT:
A Doppler radar is adapted to respond only to walking human targets by prding means to detect the frequency modulation of the Doppler signals caused by the oscillatory body movements of such walking targets. A frequency locked loop frequency modulation detector is provided for efficient detection of this so-called step frequency modulation, and the detected step frequencies are split into several bands representing targets walking at different step rates. Circuitry is shown for adapting this technique to continuous wave radars or range gated radars.

REFERENCES:
patent: 3733603 (1973-05-01), Johnston
patent: 3794771 (1974-02-01), Darboven et al.
patent: 3803539 (1974-04-01), McMaster
patent: 3882495 (1975-05-01), Bolger
patent: 4103244 (1978-07-01), Tan
patent: 4106019 (1978-08-01), Alexander

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