Patent ID: 7876262
Filing Date: 2011-01-25
Classification: G01S

Abstract:
1. A frequency modulated continuous wave radar system capable of detecting a slow moving target, the radar system comprising an electronically steered antenna and a receiver arranged to process signals received from a target located at a distance from the radar system so as to identify a Doppler frequency associated with the target, the receiver comprising: a signal processor operable to derive frequency tone data corresponding to a plurality of range gates; a low frequency blocking filter; and a Doppler processor for deriving Doppler frequency data, wherein said low frequency blocking filter is arranged to identify an average magnitude of said derived frequency tone data for respective range gates and, for each of the plurality of range gates, to subtract respectively identified average magnitude of said frequency tone data from said derived frequency tone data associated with a respective range gate signal prior to processing by the Doppler processor.