CLUTTER SUPPRESSION CIRCUIT FOR RADAR DEVICE

摘要

PROBLEM TO BE SOLVED: To exactly indicate even a target continuing long in the distance direction by correcting a sensitivity time control(STC) fixed waveform using a waveform output after logarithmically processing the received video signal and using it. ;SOLUTION: A cell averaging circuit 2 outputs Vc logarithmically processed received video signal VIN, a fixed STC waveform generation circuit 3 outputs STC fixed waveform VS determined in advance, an average differential circuit 4 outputs average VB of difference of VS and VC, a corrected value detection circuit 5 outputs average ΔV of absolute value of difference of VIN and Vc, an STC waveform calculation circuit 6 outputs actually used STC waveform VR as the addition of ΔV to the difference of VS and VB. By this, STC waveform matching the observation level can be obtained and clutter in which sharp waveform with large fluctuation continues is efficiently suppressed. Signal from a target continuing long in the distance direction such as land image has small fluctuation so that it is not cut and exactly indicated.;COPYRIGHT: (C)1998,JPO