对分组码的chase2译码算法比较与硬判决，未编码情况下的提高了误码率增加了编码增益-right to a code decoding algorithm chase2 compared with the hard decision, no coding of the increased bit error rate increased coding gain

AWGN-Rayleigh-BPSK-DSSS(BPSK调制解调直接序列扩频系统源代码(白噪声及瑞利衰落误码率比较)并给出误码率曲线的程序-AWGN-Rayleigh-BPSK-DSSS (BPSK direct sequence spread spectrum modulation and demodulation system source code (white noise and Rayleigh fading error rate comparison) and the procedu