Accession Number : ADD003315

Title :   Adaptive Clutter Cancellation and Interference Rejection System for AMTI Radar.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Goggins,William B , Jr

Report Date : 30 Nov 1976

Pagination or Media Count : 6

Abstract : The patent relates to an AMTI radar having digital doppler processing, adaptive clutter and interference rejection achieved by automatically adjusting antenna phase and amplitude weights to trim for uncalibrated errors and to put nulls in the antenna receive patterns in the direction of the source of interference or jamming signals. Antenna weights are initially chosen to achieve an optimum signal to clutter ratio. The radar receive signals are averaged over many range cells, filtered and summed by adaptive processor circuits. Feedback loops adjust the antenna weights to minimize the summed output. The circuits effect this by mechanizing the steepest descent algorithm.

Descriptors :   *Moving target indicators, *Radar antijamming, *Patents, Radar clutter, Radar interference, Cancellation, Rejection, Adaptive systems, Signal processing, Digital systems, Airborne

Subject Categories : Radar Countermeasures
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE