Patent ID: 8717230
Filing Date: 2014-05-06
Classification: G01S

Abstract:
1. A method for suppressing clutter when detecting objects of interest in a detection system comprising an antenna system and at least an two receive beams, comprising: receiving complex I/Q data from each of said at least two receive beams representing a signal containing clutter; Doppler filtering the data to generate data streams for each of the beams comprising Doppler bins representative of range values according to Doppler frequency; combining the at least two data streams to generate complex weights for each Doppler bin; applying the generated complex weights to at least one of the at least two data streams for generating a weighted data stream for spatial nulling in the direction of received clutter; combining the at least one weighted data stream with at least one remaining data streams to generate spatial nulls in the direction of received clutter; forming a post-null clutter map; and performing target detection on the combined weighted data stream using the post-null clutter map.