完成20位并行数据的伪随机序列扰码，配合解码部分，提高数字信道的SNR。已经通过综合仿真，并正在具体项目中运行，未发现任何缺点。-Completion of the 20 data-parallel pseudo-random sequence scrambling code with the decoding part, improve the SNR of the digital channel. Through integrated simulation, and run specific