The program is to simulate the variation in probability of error with signal energy/bit (constant noise power) for OQPSK & MSK in AWGN Channel

利用matlab仿真了改进的二类选择重传HARQ机制的吞吐量与误比特率之间的关系。在仿真中对于编码和解码过程进行了简化：根据误比特率按概率模拟传输过程中码字的出错位数，在接收端只判断码字错误的位数是否在可纠错得范围之内。每发送一个码字，接收端根据出错位数信息检验其是否出错，没有出错则接收，否则要求重发，程序中利用alternate值交替发送信息码字和校验码字。当校验码字到来后，若校验码与原码组成的新码字能够纠错，则正确接收，否则要求重传。 -Retransmission the HARQ mec

a Matlab code that produces a plot of probability of bit error rate for QPSK versus SNR for three receive antennas, and three different combining methods: MRC, equal gain combining, and selection combining. The plot is generated by using Monte Carlo