Device for eliminating fixed echoes in a radar

Details Device for eliminating fixed echoes in a radar Device for eliminating fixed echoes in a radar

1978-11-22

1988-11-01

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Clutter elimination

Mti

342162, G01S 1352

Patent

active

047823437

ABSTRACT:
A device for eliminating fixed echoes in a pulse radar. The device is provided with a demodulator unit where intermediate frequency signals of the radar are demodulated into video-frequency signals. The video-frequency signals are utilized in a utilizing unit provided with a display unit. A processing unit of the video-frequency signals is connected between the demodulator means and the utilizing unit. The processing unit is constituted with a range unit sampling circuit, a Doppler filtering unit and a video-frequency signal dynamic compressing unit connected in series. The processing unit is further provided with, on the one hand, a video-frequency signal amplitude measuring circuit for measuring at least the video amplitude signal in two range units in the same transmission recurrence and, on the other hand, with a dynamic compression control unit as a function of these amplitude, the video-frequency signal amplitude measuring circuit and the dynamic compression control unit being series connected upstream the Doppler filtering unit. w

REFERENCES:
patent: 3134101 (1964-05-01), Dickey, Jr.
patent: 3166746 (1965-01-01), Jacobson
patent: 3360796 (1967-12-01), Rush
patent: 3388394 (1968-06-01), Cappadona
patent: 3573822 (1971-04-01), Kennedy
patent: 3614784 (1971-10-01), Richmond
patent: 3680096 (1972-07-01), Bosc
patent: 3721978 (1973-03-01), Daggett, Jr.
patent: 3742500 (1973-06-01), Freedman
patent: 3745571 (1973-07-01), Chwastyk et al.
patent: 3877011 (1975-04-01), Holberg et al.

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