Patent ID: 8599060

Claim:
A system for suppressing unwanted signals when detecting objects of interest with a detection system comprising an air traffic control radar scanning antenna system using two or more receive beams, comprising an input means arranged to obtain from said antenna system receive signals from a first receive beam and receive signals from at least one second receive beam responsive to the same emission signal; a coupling means arranged to couple the receive signals from the first receive beam to the receive signals from the at least one second receive beam, so as to obtain a detection signal for the objects of interest with suppressed unwanted signal contribution; means for dividing the region, covered by the detection system, in different azimuth-range cells; a calibration processor for deriving coupling parameters for coupling the receive signals of the first beam and receive signals of the at least one second receive beam so as to obtain a detection signal for the objects of interest with suppressed unwanted signal contribution; and whereby different coupling parameters are derived for different azimuth-range cells.