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本文简单介绍了Turbo码基本原理、子码编码器和交织器设计等 ,详细地分析了Turbo码的基于MAP译码算法和基于SOVA译码算法的迭代译码方法及其性能 ,并与卷积码的性能进行了比较。重点论述了Turbo码在DS -CDMA移动通信系统的码率与扩频增益折衷设计、迭代译码和性能仿真结果。最后 ,简单论述了Turbo码在OFDM CDMA中的应用。
This paper briefly introduces the basic principle of Turbo codes, the design of subcode encoder and interleaver, and analyzes the iterative decoding method based on MAP decoding algorithm and SOVA decoding algorithm of Turbo codes and its performance in detail. The performance of the code was compared. The emphasis is put on the compromise between code rate and spreading gain of Turbo codes in DS-CDMA mobile communication system, iterative decoding and performance simulation results. Finally, the application of Turbo codes in OFDM CDMA is briefly discussed.