Receiver with fixed-echo suppressor

Details Receiver with fixed-echo suppressor Receiver with fixed-echo suppressor

1978-11-27

1980-11-11

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 734

Patent

active

042336040

ABSTRACT:
A receiver of a pulse-type radar has a main i-f channel feeding a fixed-echo suppressor of limited dynamic range and, in parallel therewith, an ancillary channel of extended dynamic range including a logarithmic amplifier and a processor. The latter averages the amplitude of incoming echo signals over a range-and-azimuth cell and then over one or more antenna revolutions. The resulting mean value of the signal amplitude is used to control the gain of a linear amplifier in the main channel so as to adapt the dynamic range of the echo signals to that which can be handled by the fixed-echo suppressor.

REFERENCES:
patent: 3487405 (1969-12-01), Molho et al.
patent: 3755813 (1973-08-01), Evans et al.
patent: 3781883 (1973-12-01), Effinger et al.
patent: 3786506 (1974-01-01), Effinger et al.
patent: 4144533 (1969-03-01), Van Hijfte et al.

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