一种空时分组码在频率选择性信道下的半盲递推解码  

Recursive Semi-blind Decoding of a Space-Time Block Code in Frequency-Selective Channel

作　　者：罗铭[1] 殷勤业[1] 丁乐[1] 曾雁星[1] 

机构地区：[1]西安交通大学电信学院信息工程研究所,西安710049

出　　处：《电子与信息学报》2005年第12期1942-1946,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60272071)教育部博士点基金(20030698027;20020698024)资助课题

摘　　要：该文针对频率选择性信道下的Alamouti字时分组码，提出了一种在接收端未知信道信息的情况下的半盲的递推解码方法。该方法基于子空间方法，利用少量的导频符号和空时分组码的结构，递推地同时完成信道均衡和解码，直接解得信息符号。与已有的按块批处理的盲解码方法相比，递推方法因为在递推过程中利用已经判得的过去的信息符号，能够方便地进行性能与运算量的折衷。仿真结果验证了方法的有效性。In the paper, assuming frequency-selective channel, a recursive semi-blind joint equalization and decoding method for Alamouti space-time block code is proposed. Based on subspace-based blind equalization method, the proposed method sequentially decodes Alamouti space-time block code without channel state information by exploiting the structure of the space-time block code and a few pilot symbols. In contrast with previous block-based blind decoding methods, the proposed method is more amicable to allowing tradeoff between performance and complexity. Simulation results demonstrate the effectiveness and flexibility of the proposed method.

关 键 词：递推解码 空时分组码 频率选择性 盲均衡 联合均衡解码 

分 类 号：TN911.22[电子电信—通信与信息系统]