dbpsk信号的调制解调matlab代码实现的一个例子，调制时差分编码，这样用1bit延迟差分检测的结果，直接就是原码，解调采用1bit差分延迟检测．-DBPSK signal modulation and demodulation matlab code an example of differential modulation encoding, such 1bit delay with the results of differential detection, direct that t