processor with ground clutter control may include an i f amplifier 11 coupled to receive i f signals from an input terminal 12 and having an output terminal coupled to an i f limiter 13 the output terminal of the i f limiter is coupled to a first mixer 14 and a second mixer 15 a coherent local oscillator 16 is coupled to mixer 14 and through a 90 u00b0 phase shifter 17 to mixer 15 analog to digital a d converters 21 and 22 have input terminals respectively coupled to the output terminals of mixers 14 and 15 and their output terminals respectively coupled to digital mti processors 23 and 24 the output terminals of the a d converters are also coupled to a signal combiner 25 having its output terminal coupled to the negative terminal of a difference amplifier comparator 26 to the positive terminal of which a threshold signal is coupled a second signal combiner 27 is coupled to the output terminals of the mti processors 23 and 24 the output terminal of which is coupled to an amplitude detector 28 an and gate 31 has one input terminal coupled to the output terminal of detector 28 and a second input terminal coupled to the output terminal of difference amplifier comparator 26 and its output terminal coupled to the video processor of the radar system an i f signal coupled to input terminal 12 is coupled to limiter 13 after amplification by i f amplifier 11 the i f limiter 13 imposes a limit on the level of.