说明：  卷积码译码算法改进 实现Conv.(2,1,9)的编码、软判决滑动窗维特比译码，其生成多项式为G0=561(八进制),G1=753(八进制)，调制方式为BPSK，信道为AWGN，比较不同的译码深度对译码器性能的影响
(convolutional code decoding algorithm to improve achievement Conv. (2,1,9) of the Code, Soft Decision sliding window Viterbi Decoder, generating polynomial for the G0 = 561 (octal), G1 = 753 (octal), for BPSK modulation mode, channel for AWGN, compare different depth of decoding decoder performance of)