说明：  BPSK仿真在AWGN信道下产生卷积码和非卷积码的比较，约束长度7，多项式[171,133],码率1/2，分别采用硬判决和软判决
(Convolutional code and convolutional code comparison, simulation BPSK in AWGN channel constraint length 7 polynomial [171,133], code rate 1/2, respectively, using the hard-decision and soft-decision)