Turbo码交织器性能分析

Interleaver Evaluation of Turbo Block Code

Ｔｕｒｂｏ码是近年来信道编码理论研究的热点课题，而交织器的设计对Ｔｕｒｂｏ码的性能有很大的影响．本文介绍了一种Ｔｕｒｂｏ码交织器性能的分析方法，并对以（７，４）汉明码为分量码，交织长度为１６的（４０，１６）Ｔｕｒｂｏ汉明码作分析，给出理论分析及采用文献［２］的迭代方法的计算机仿真实验的结果，由此证实了这种方法的有效性．仿真结果还表明，文献［１］的评价交织器性能的方法比文献［３］的方法更可靠，说明传统的以相关系数来评价交织器性能的方法有局限性，不一定能应用到Ｔｕｒｂｏ码之中来．

The design of the interleaver is important to the performance of Turbo Codes. In this paper the encoding and iterative decoding of Turbo Block Code is discussed with a focus on the way to evaluate the performance of Turbo Code interleaver. It gives a theoretical analysis as well as the result of computer simulations. The effectiveness for evaluating Turbo Code interleaver in such way is proved. Moreover, through comparison with other evaluating methods, a conclusion is drawn that when evaluating the interleaver of Turbo Code, the traditional way, which .utilizes relative coefficients, has its own limitations and may not be accurate and effective.