Clutter filter using a minimum number of radar pulses

Details Clutter filter using a minimum number of radar pulses Clutter filter using a minimum number of radar pulses

1980-02-21

1982-03-02

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 77, G01S 1352

Patent

active

043180990

ABSTRACT:
A clutter filter which reduces by (N-1) the number of input pulses required or operation of an N-pulse MTI canceler when L>N consecutive filtered outputs are desired. The clutter filter includes the two channels of an N-pulse MTI canceler which weight and sum the in-phase and quadrature-phase components of N radar returns, and a pair of delay circuits which introduce a delay of N interpulse time periods to the N and subsequent in-phase and quadrature-phase components of the radar returns. The stored outputs of the two channels of the canceler and the consecutive outputs of the delay circuits are combined in a complex multiplier to generate the consecutive in-phase and quadrature-phase outputs of the filter. The clutter filter has utility in a multiple-stage filter system employing a Doppler filter as the last stage.

REFERENCES:
patent: 3631490 (1971-12-01), Palmieri
patent: 3797016 (1974-03-01), Martin
patent: 4035799 (1977-07-01), Hsiao
patent: 4137532 (1979-01-01), Taylor, Jr. et al.
patent: 4153899 (1979-05-01), Taylor, Jr.
patent: 4217584 (1980-08-01), Lombardi et al.

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