高速数据传输系统中，8PSK为常用的调制方式。为了满足更高的误码率指标，本文对软判决算法进行了深入的研究，并针对两种不同的软判决算法进行了误码率仿真。-high-speed data transmission system, commonly used for 8PSK modulation. In order to meet the higher rate of error, this pair of soft decision algorithm for the in-depth stud

将多级调制时, 映射到同一符号的不同比特具有不同可靠性的特性引入软输出高阶解调算法中, 推导出一套 简单易行的通用算法, 使得在任何格雷映射方式下, 都能够使用一组相同的两级递推公式计算比特软判决信息。提供了一种 具有低复杂度的通用的高性能软输出高阶解调算法。-Multi-level modulation, the symbols are mapped to the same bit different with different characteristics of the reli

对图像加入白噪声干扰，用维特比译码进行去扰，分别用硬判决和软判决，显示出的图像可以看出不同的效果-White noise is added to the image, performed using Viterbi decoding descrambling, respectively, with the hard decision and soft decision, showing the different effects can be seen in the image