基于最大似然估计的优化盲检测方案  

An Advanced Blind Detection Scheme Based on Maximum Likelihood Estimate

作　　者：胡震宇[1] 殷奎喜[1] 吴华玉[1] 卞晓晓[1] 

机构地区：[1]南京师范大学物理科学与技术学院

出　　处：《金陵科技学院学报》2008年第2期23-25,共3页Journal of Jinling Institute of Technology

基　　金：江苏省重点实验室开放基金(JK20050304)

摘　　要：提出了一种应用于空时分组编码系统的优化盲检测方案,可以达到降低计算复杂度之目的。文章首先建立了空时分组编码的系统模型,并且介绍了最大似然估计的理论。在此基础上,提出盲检测迭代算法终止时机因子的概念,通过调节终止时机因子,可以平衡降低误码率和减少运算量之间的关系,以满足实际情况的需要。理论分析表明,此方法具有可行性,而通过Matlab仿真得到在计算量有限的情况下,通过减小终止时机因子并且增加级联在一起的空时分组码矩阵个数,可以降低比特误码率。In this paper, an advanced blind detection scheme which can be applied to space-tlme block code system is proposed, and this scheme can reduce calculation complicacy, This text establishes a model of space-time block code system at first, and also introduces the theory of maximum likelihood estimate. Based on these which have been described above, the conception of termination occasion gene using in blind detection iterative algorithm is advanced, and the method of adjusting termination occasion gene can balance bit-error-rate reducing and operation cycles decreasing to fulfill actual requirement. The analysis indicates that this solution is feasible; furthermore, the Matlab simulation results illustrate that, in finite calculation capacity, decreasing termination occasion gene can increase the concatenation space-time block coding matrices which have positive effect on bit-error-rate reducing.

关 键 词：空时分组编码 最大似然估计 盲检测 迭代算法 

分 类 号：TN929.5[电子电信—通信与信息系统]