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交织器的结构可以影响到Turbo码的最小码距,进而影响其编码增益,最终对误比特率产生较大影响。交织器的主要功能就是随机化输入信息码序列,并让两个子编码模块在任何时刻,不会同时输出码重较轻的码字。交织器的随机性直接影响着Turbo码并行译码性能,针对现有无冲突交织器中随机性较小的特点,引入行内、行间交织等处理方式,进一步增加了交织表的随机性,以此提高Turbo码并行译码的性能,并给出了行内、行间交织设计实例。
The structure of the interleaver can affect the minimum code distance of the turbo code, thereby affecting its coding gain, which eventually has a greater impact on the bit error rate. The main function of the interleaver is to randomize the input information code sequence and let the two sub-coding modules not output codewords with lighter codes at any time. The randomness of the interleaver directly affects the performance of parallel decoding of Turbo codes. In order to reduce the randomness in the existing non-conflicting interleaver, the intra-and inter-line interleaving and other processing methods are introduced to further increase the randomness of the interleaving table. This improves the performance of Turbo code parallel decoding, and gives examples of inter-line and inter-line interleaving design.