M准则搜索节点自适应的空间调制检测算法  

Adaptive searching node algorithm for spatial modulation based on M-algorithm

作　　者：文思杰 金小萍[1] 冯会真[1] 

机构地区：[1]中国计量学院信息工程学院,浙江杭州310018

出　　处：《中国计量学院学报》2015年第3期280-284,共5页Journal of China Jiliang University

摘　　要：为了解决空间调制系统(SM)下,M算法搜索过程中搜索节点数难以确定及算法复杂度偏大的问题,提出一种搜索节点数自适应于累积度量值的检测算法(IM-ML).传统的M-ML算法在树形结构中进行搜索时每层保留的节点数为一个固定值,而我们提出的算法在每层搜索保留K个节点的前提下,保留度量值大于K个节点的有限个节点.仿真结果表明,改进后的M-ML检测算法在K值较小的情况下就能取得传统MML算的性能,同时降低了算法复杂度.To solve the problem of being hard to fix the node number in the search process and the high complexity of M-algorithm under spatial modulation, an improved M-ML algorithm（IM-ML） with node number searching adapted to accumulated metrics was presented. Compared with the traditional M-algorithm in which the number of retained nodes at each level of the tree structure was a fixed value, the IM-ML algorithm retained the finite number of nodes where the accumulated metrics was greater than K nodes under the premise that the K nodes had been kept at each level of the tree structure. Simulation results showed that the IM-ML algorithm could obtain a near-optimum bit error rate performance compared with the traditional M- ML algorithm and its complexity reduced.

关 键 词：空间调制 M算法 M-ML算法 

分 类 号：TN914[电子电信—通信与信息系统]