Doppler determination system for MTI radars

Details Doppler determination system for MTI radars Doppler determination system for MTI radars

1989-10-05

1991-07-30

Tarcza, Thomas H.

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

Clutter elimination

Mti

342162, G01S 13526

Patent

active

050363255

ABSTRACT:
A doppler determination system uses an amplitude comparison of odd and even MTI functions derived from the same signal returns in an MTI radar system to determine the doppler frequency of a target return. The system determines the ratio of the amplitudes of the return of a single canceller circuit with a delay of 2/PRF and the amplitude of the return of a double canceller with two delays of 1/PRF. The ratio is then employed to estimate the doppler frequency of the return. The respective amplitudes of the two MTI circuits are also processed in a 3-dimensional radar application to provide estimates of the target radar cross-section and elevation angle, and with PRF switching to determine the target unambiguous range rate.

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