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讨论采用软输出迭代译交织级联卷积码（Ｔｕｒｂｏ码）编译码器中的交织器优化设计问题．从基于最大后验概率（ＭＡＰ）算法与迭代译码的Ｔｕｒｂｏ码编译码原理出发，给出交织器设计的一些基本方法并分析其特点；提出“保奇偶”的随机交织器设计方案，它能有效地改善某些以提高编码效率为目的的“删余截短”Ｔｕｒｂｏ码的纠错性能．通过计算机仿真得出一些Ｔｕｒｂｏ码在加性高斯白噪声信道中采用不同交织器时的误码率数据，分析了交织类型和交织深度的变化对Ｔｕｒｂｏ码纠错性能的影响．针对Ｔｕｒｂｏ码的特点提出了在卫星通信等应用中交织器设计的实用性结论．
This paper discusses the optimization design of interleaver in soft-output iterative interleaving interleaved concatenated convolutional code (Turbo code) codec. Based on the principle of Turbo codes coding and decoding based on maximum a posteriori probability (MAP) algorithm and iterative decoding, some basic methods of interleaver design are given and their characteristics are analyzed. A design scheme of “guaranteed parity” random interleaver is presented. Effectively improve some error correction performance of “punctured truncated” Turbo codes for the purpose of improving coding efficiency. The error rate data of Turbo codes using different interleavers in additive white Gaussian noise channel are obtained by computer simulation. The influence of interleaved type and interleave depth on error correction performance of Turbo codes is analyzed. According to the characteristics of Turbo codes, the practicality of interleaver design in satellite communications applications is put forward.