| 摘要 |
<p>PURPOSE:To obtain the best threshold value for suppressing a clutter contained in a radar video by varying positively the number of stages of delay circuits forming a signal transmission line. CONSTITUTION:Delay circuits 12F and 13F which constitute the signal transmission line 10' across a center cell 1 are variable delay circuits and a magnification device 25F which constitutes a total averaging circuit 20' with adders 21 and 22, a subtracter 23, an integrator 24, etc., is a variable magnification device whose magnification 1/M is varied and set according to the number M of delay stages. A high cutoff frequency varies in proportion to the reciprocal of the number M of delay stages, so the number M of stages is varied to realize control the setting of the high cutoff frequency. Consequently, invariably constant warning probability can be maintained without being affected by the property of the clutter contained in the radar video.</p> |
