手机图像自动转换，自动伸缩，图片形状实时转换-phone images automatically converted automatically extendable, real-time pictures change shape

this code simulate channel model

this code is the hamming windowind(In signal processing, a window function (also known as an apodization function or tapering function[1]) is a mathematical function that is zero-valued outside of some chosen interval. For instance, a function that i