With the basic unfocussed compression method, a fixed width rectangle window in time domain was used to process the azimuth chirp signal with a moving average and all of these were completed only using complex addition. 方位向非聚焦压缩的原始方法是采用一个固定宽度的时域矩形窗对方位向所形成的线性调频信号进行滑动滤波,使用简单的加法操作完成方位向非聚焦压缩。