效果不错，真是很亲民的DIY方案。

通过将多普勒频率接近零的回波成分过滤掉可以去除静止物体：

参考作品（XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX）文中提到他的做法：

The above time-range plot is recorded with a single horn antenna so there is no angle information. Clutter is removed by subtracting the previous sweep from the current one leaving just the moving objects. Without the clutter reduction there are so many targets that it's hard to see anything.

看他的效果对比图，可能与静背景作差效果好一些，也许可以对比一下试试。

PS：国外那位做了N个版本了，我觉得第一版的选型性能不是很好，但他的新作品改进得比较完善。