Pulse Doppler radar with fixed target echo rejection circuit for

Details Pulse Doppler radar with fixed target echo rejection circuit for Pulse Doppler radar with fixed target echo rejection circuit for

1981-08-20

1984-06-12

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 171PF, G01S 1350

Patent

active

044545118

ABSTRACT:
A fixed target echo rejection circuit in a pulse Doppler radar device which uses recursion filters and which have a return loop with the feedback signal passing through a weighting multiplier. The weighting function of the recursion signal occurs when a change of the pulse repetition frequency (PRF) occurs by switching and changing the weighting factors. So as to reduce spurious signals which would occur during switching, the weighting factor switching is delayed and carried when the recursion signal passes through a zero value so as to substantially reduce the spurious signals.

REFERENCES:
patent: 3925614 (1975-12-01), Bousmar
patent: 4034196 (1977-07-01), Butterweck et al.
patent: 4093949 (1978-06-01), Evans
patent: 4117538 (1978-09-01), Shrader et al.

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