说明：  This file is used to simulate performance of the FMT system with different modulation method in baseband。（该程序主要实现FMT系统差分编码下基带误码率分析！）
(This file is used to simulate performance o f the FMT system with different modulation meth od in baseband. (The procedure main difference FMT system under the base-band coding error rate analysis!))