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提出一种基于硬判决BICM-ID系统中的迭代盲信道估计算法。该算法基于最大似然估计(ML)同步算法,利用BICM-ID译码产生的硬判决信息,通过迭代地在信道估计和解码之间交换信息来完成联合信道估计和解码。仿真结果验证了算法的有效性,并分析了信噪比和块衰落信道的块长对迭代信道估计性能的影响。
An iterative blind channel estimation algorithm based on hard decision BICM-ID system is proposed. Based on the maximum likelihood estimation (ML) synchronization algorithm, the algorithm uses hard decision information generated by BICM-ID decoding and performs joint channel estimation and decoding by iteratively exchanging information between channel estimation and decoding. The simulation results verify the effectiveness of the proposed algorithm and analyze the effect of signal-to-noise ratio and the block length of the block fading channel on iterative channel estimation performance.