（毕业设计论文）比特交织编码调制迭代译码联合迭代载波相位和信道估计算法.docVIP

论文 比特交织编码调制迭代译码联合迭代载波相位和信道估计算法 摘要:针对16apsk信号，提出一种比特交织编码调制迭代译码(bicm.id)联合迭代载波相位和信道估计算法。该算法基于最大似然估计算法，利用bicm.id译码产生的硬判决信息，通过迭代的方式在相位估计、信道估计和译码之间交换信息，从而实现相位估计、信道估计和译码的联合处理。仿真结果验证了算法的有效性，并给出了算法的适用范围。 在误码率为10-4时，该算法与理想性能曲线仅相差0.5db左右；算法能够估计的相差范围为[-20°,20°]。 关键词:比特交织编码调制迭代译码；16apsk信号；相位估计；信道估计；最大似然估计 iterative carrier phase and channel estimation algorithm in bicm.id cui peng.hui*, yang yu.hong, zeng xiang.feng( institute of information engineering, information engineering university, zhengzhou henan 450002, chinaabstract: this paper proposed an iterative carrier phase and channel estimation algorithm for 16apsk in bicm.id. the algorithm was based on maximum likelihood estimation, which made use of the decision information provided by the decoder and exchanged information between phase, channel estimation and decoder through iteration, so as to combine phase, channel estimation with decoder. simulation results show the algorithm is effective and give the range applied to the algorithm. this paper proposed an iterative carrier phase and channel estimation algorithm for 16apsk in bit.interleaved coded modulation with iterative decoding (bicm.id). the algorithm was based on maximum likelihood （ml） estimation, which made use of the decision information provided by the decoder and exchanged information between phase, channel estimation and decoder through iteration, so as to combine phase, channel estimation with decoder. the simulation results show the algorithm can get the performance only 0.5db lower than the ideal one, and can effectively estimate the phase difference from -20 degree to 20 degree. is effective and the application scope of the algorithm has also been pointed out. key words: bit.interleaved coded modulation with iterative decoding (bicm.id); 16apsk signal; phase estimation; channel estimation; maximum likelihood (ml) estimation 0引言比特交织编码调制(bit.interleaved coded.modulation,bicm)［1-2］，通过在编码和调制之间引入比特交织器将纠错码和星座映射相结合，能够获取更高的分集度，改善比特误码率（bit error rate,ber)性能。其译码采用