采用列表检测的单载波频域均衡  

List-based Detection of Single-carrier Frequency Domain Equalization

作　　者：仲元红[1] 曾凡鑫[2] 吴华[1] 张振宇[2] 

机构地区：[1]重庆大学通信工程学院,重庆400044 [2]重庆通信学院,重庆400035

出　　处：《四川大学学报（工程科学版）》2010年第4期160-164,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(60872164)

摘　　要：为了提高单载波频域均衡系统的符号检测性能,提出了一种采用列表检测的单载波频域均衡方法,并分析了其性能。算法首先提取传统单载波频域均衡系统均衡后符号的比特可靠度,然后对窗口长度内符号可靠度低于设定阈值的符号进行列表,对比所有列表值的似然性,具有最大似然性的列表值为最终检测值。根据阈值的选择,以及窗口大小的选择,算法可以在复杂度与性能上进行灵活配置。仿真结果表明,该算法在频率选择性衰落信道下可以取得良好的性能。In order to improve the performance of symbol detection in single-carrier frequency domain equalization （ SC-FDE） system,a list-based detection method used in SC-FDE was proposed,and its performance was analyzed. The algorithm firstly extracted bit reliabilities of conventional SC-FDE symbols,then listed the symbols whose reliability were lower than the threshold,and compared all the likelihood of listed symbols. The symbol with maximum likelihood was set to be the final detection values. According to the choice of threshold,as well as the choice of window size,the algorithm could offer a flexible configuration between implementation complexity and performance. Simulation results showed that this method can achieve significantly improved performance in frequency selective fading channel.

关 键 词：单载波频域均衡 可靠度 列表检测 

分 类 号：TN929.5[电子电信—通信与信息系统]