Doppler signal processing apparatus

Details Doppler signal processing apparatus Doppler signal processing apparatus

1980-05-29

1982-03-09

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 1360

Patent

active

043192459

ABSTRACT:
A doppler type speed sensor produces a doppler signal having a spectrum of frequencies including a frequency of peak amplitude corresponding to the actual speed of an object. The frequencies are supplied to a narrowband voltage tunable filter, the frequency bandwidth of which is continuously adjusted by a periodically reoccurring sweep signal applied thereto. The output of the filter is coupled to a peak detecting circuit which produces a pulse when the maximum amplitude signal is received thereat. The sweep signal and pulse are applied to the inputs of a sample-and-hold circuit to cause the sample-and-hold circuit to hold and produce a signal corresponding to the value of the peak frequency and therefore the speed of the object.

REFERENCES:
patent: 3011166 (1961-11-01), Fell et al.
patent: 3171118 (1965-02-01), Chambers et al.
patent: 4008473 (1977-02-01), Hinachi et al.
patent: 4016568 (1977-04-01), Makimoto et al.

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