要进行误码率的计算，需要分两步进行，即抽样和判决。假

设信源信息码长度为M，每个信息码包含N 个采样点数，则，先从第一个信

息码的N 个采样点中，随机抽取i 个，判断是否全为1，或全为－1，这样就

确定了此信息码为1 还是－1；以同样的方法对输出的信息码再做一次，最后

将两个信息码的判断结果进行比较，不同就记录下来，进行累加，相同则进

行下一次循环。M 个循环后，把累加和的结果除以M，就得到本系统的误码

率了。

-To calculate the error rate, you need two steps, namely, sampling and decision. Assuming the information source code length M, each message contains N sampling points code, then, starting with the first information code of the N sampling points, randomly selected i-, 1 to determine whether all, or are all-1 , so this information to determine the code is 1 or-1　in the same way the information on the output of code to do it again, the last two codes to determine the information to compare the results with different to record the accumulation, the same will be the next cycle. M cycles, the accumulation and by the outcome of M, to obtain the BER of the system.