说明：  在SIMO i.i.d.瑞利衰落信道上进行无编码QPSK传输，采用MRC组合和两个接收机。仿真SNR从0到20dB。
(Uncoded QPSK transmission over a SIMO i.i.d. Rayleigh fading Channel with MRC combining and two receivers. SNR from 0 to 20dB simulation.)