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11. 发明专利

JPH04348293A VEHICLE-BORNE RADAR APPARATUS 失效
公开(公告)号：JPH04348293A
公开(公告)日：1992-12-03
申请号：JP19752191
申请日：1991-05-07
申请人： HONDA MOTOR CO LTD
发明人： KAWAI TAKAYUKI , ASHIHARA ATSUSHI
IPC分类号： G01S7/295 , G01S13/60
摘要： PURPOSE:To remove a noise component by providing a nonlinear filter processing means whereby the value of a detection signal of a radar apparatus just before a change thereof is made to be held when the detection signal makes the change beyond a preset threshold value within a prescribed time. CONSTITUTION:A signal of a transmission frequency generated from an oscillator 1 is passed through a modulator 2, etc., and emitted from an antenna 5, and a reflected wave from an object is received by the antenna 5, converted into a digital signal as a radar detection signal and stored temporarily in a buffer memory 9. The digitized radar detection signal epsilon read out from the memory 9 is subjected to a nonlinear digital filter processing by an epsilon filter processing element 10. Since the processing element 10 is so designed as to apply an epsilon filter processing only to a part of the signal which changes to a large extent beyond a threshold value set beforehand, it makes the value just before the change be held for the part smaller than the threshold value. In this way, optimum removal of noise can be conducted without deteriorating the characteristic of the radar detection signal.

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