| 摘要 |
<p>PURPOSE:To improve detection probability by conducting a Weibull CFAR processing for a short-distance reception signal and by conducting a Rayleigh CFAR processing for a long-distance reception signal. CONSTITUTION:A switching control circuit 3 controls a switching circuit 4 according to a distance information so that a Weibull CFAR processing be selected in a short distance wherein sea clutter exists. A short-distance reception signal is inputted to a Weibull CFAR circuit 2 and the result of detection is outputted through a switching circuit 4 on the output side which is in linkage to an input-side switching circuit. Regarding an unnecessary signal contained in a long-distance reception signal, on the other side, the switching control circuit 3 controls the switching circuit 4 so that a Rayleigh CFAR processing be selected, since the distribution of amplitude of receiver noise and the like is accords with the Rayleigh distribution. The long-distance reception signal is inputted to a Rayleigh CFAR circuit 1 and the result of recection is outputted through the switching circuit 4 on the output side.</p> |
