对MPAM调制方式的仿真，做出ser和ber曲线，与理论值比较。-simulation about MPAM modulation and demodulation. Draw ser and ber curve, compared to theoretical ones.

实现Rayleigh平衰落信道下MPAM调制方式的误码率与误比特率对信噪比的仿真，M取2^m，其中m=1,2,...,6。-Realize the Rayleigh flat fading channel bit error rate and bit error rate of MPAM modulation way under the simulation of signal to noise ratio, M ^ 2 M, with M = 1, 2,...6.