雷达不仅接收目标反射波,而且同时接收地面和云、雨等有害杂波。为抑制杂波提取目标反射波必须使用滤波器。抑制地面静止杂波的滤波器和动目标显示雷达已经开发实用。而抑制雨、云等移动杂波的滤波器,虽已采用,但是因为手工操作多受操作手熟练程度的影响,所以还不实用。 Radar not only receives the target reflected wave, but also receives the harmful clutter such as the ground and cloud, rain and so on at the same time. A filter must be used to extract the target reflected wave to suppress clutter. Filters that suppress ground clutter and moving target display radar have been developed and applied. The filter that suppresses moving clutter, such as rain and cloud, has been adopted, but it is not practical because it is greatly affected by proficiency of operators.