说明：  SIRP法仿真K分布杂波，之前有下载过类似的，但是建立非线性表时的函数定义是有错误的，进行了修改，可以得到较好的估计效果
(Simulating K distribution clutter by SIRP, similar to the code which been downloaded before, but when the establishment of non-linear function is wrong and modified, you can get a better estimate effect )