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Turbo码基于随机编码的思想,将卷积编码与交织器结合使其性能接近香农极限,所以Turbo码被3G移动通信系统所采纳并在深海通信、卫星通信等功率受限领域得以应用。文中介绍了Turbo码的译码原理并分析了几种主要的译码方法,在Matlab环境下对Turbo码进行了仿真研究,分析了不同的迭代次数、译码算法、帧长、码率及分量码对其译码性能的影响。仿真结果表明Turbo码纠错性能优良,具有广泛的应用前景。
Based on the idea of stochastic coding, Turbo codes combine convolutional coding with interleaver to make its performance close to Shannon limit. Therefore, Turbo codes are adopted by 3G mobile communication system and applied in power-limited areas such as deep-sea communications and satellite communications. This paper introduces the decoding principle of Turbo codes and analyzes several main decoding methods. The Turbo codes are simulated in Matlab environment, and the different iterations, decoding algorithms, frame length, bit rate and components are analyzed The influence of code on its decoding performance. Simulation results show that Turbo codes have good error correction performance and wide application prospect.