对于低空搜索雷达、砲位侦察校射雷达来说,其目标回波信息有两个显著的特点:一个是目标通常均以强地物为背景(如山丘、城镇、村庄、树林等),地物的有效反射面积和目标相比一般均有30～40~(d_b)三差,有时还能差到40～50~(d_b)以上;另一个是目标回波数较少,通常只有几十,甚至十来个。因此要从强杂波条件下检测出目标来,就要采 For low-altitude search radars, gobo reconnaissance school radar, the target echo information has two salient features: one is the target are usually strong objects as the background (such as hills, towns, villages, woods, etc.), The effective reflection area of ​​the object and the target compared to 30 ~ 40 ~ (d_b) triple difference, and sometimes poor to 40 ~ 50 ~ (d_b) above; the other is the target echo less, usually only a few dozen, Or even a dozen. Therefore, to detect the target from the strong clutter conditions, we must adopt