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

Iterative carrier phase and channel estimation algorithm in BICM-ID

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。在误码率为10-4时,该算法与理想性能曲线仅相差0.5 dB左右;算法能够估计的相差范围为[-20°,20°]。

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 0.5 dB lower than the ideal one,and can effectively estimate the phase difference from-20 degree to 20 degree.