Circuit arrangement for eliminating fixed echoes in a pulse

Details Circuit arrangement for eliminating fixed echoes in a pulse Circuit arrangement for eliminating fixed echoes in a pulse

1978-06-23

1980-09-09

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 942

Patent

active

042220491

ABSTRACT:
To eliminate fixed echoes at the receiver of a pulse radar, incoming i-f signals are demodulated, subjected to Doppler filtering, centered and bottom-clipped to eliminate those whose amplitudes lie below a certain threshold. The centering operation and/or the magnitude of the threshold are controlled automatically as a function of the amplitude of the incoming signals as measured upstream of the Doppler filter.

REFERENCES:
patent: 4053885 (1977-10-01), Tomita et al.
patent: 4083049 (1978-04-01), Mattera et al.

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