基于混沌交织的比特交织编码调制及迭代译码系统性能分析

Performance of iteratively decoded bit-interleaved coded modulation with chaos based interleaving strategies

比特交织编码调制及迭代译码(BICM-ID)是适合下一代移动通信系统的一种高效数据传输方式.交织器的设计是影响BICM-ID系统卓越性能的一个关键因素.为了进一步提高BICM-ID系统性能,本文研究了混沌理论在交织器设计中的应用,提出一种新的混沌交织算法,与伪随机交织器相比该方案具有更低的系统时延和更高的传输效率.加性Gauss白噪声信道和Rayleigh衰落信道中的性能仿真结果表明,本文所提出的混沌交织器比伪随机交织器的性能要好,在BICM-ID系统中具有卓越的性能.

Bit-interleaved coded modulation with iterative decoding（BICM-ID） is a bandwidth effcient transmission scheme which is well suitable for next-generation mobile communications.The interleaver design is critical to the high performance of BICM-ID.In this paper we investigate the application of the chaos theory to the interleaver design to further improve the performance of BICM-ID.A new interleaving scheme based on the chaos theory is proposed.Compared with the random interleaver,the proposed approach has the advantages including lower system delay and higher transmission effciency.Simulation results in both additive white Gaussian noise（AWGN） channel and Rayleigh fading channel are provided,which demonstrates that the new interleaver is better than the random interleaver and exhibits excellent performance when applied to the BICM-ID system.