基于MIMO系统的球形译码算法的改进  

Improved Sphere Decoding for MIMO System

作　　者：陈云杰[1] 吴耀军[1] 居贝思[1] 

机构地区：[1]华东理工大学信息学院,上海200237

出　　处：《通信技术》2010年第6期24-25,28,共3页Communications Technology

摘　　要：在最大似然检测中,球形译码算法是一种有效的快速算法。提出一种基于MIMO系统的新的快速球形译码算法,它的复杂度比传统的算法要小的多。在提出的方法中,初始半径的选择并不重要。这种改进算法的译码性能和复杂度由两个参数来控制。因此,该方法存在着译码性能和复杂度的均衡。通过计算机仿真,可以看到,提出改进算法的译码性能得到了较大的提高。Sphere decoding technique is an efficient fast algorithm for maximum likelihood（ML） detection.In this paper,a new faster sphere decoding algorithm for multiple-input multiple-output（MIMO） systems is proposed,and its complexity is much less than that of the conventional algorithm.In the proposed method,the initial selection of sphere radius is not important,and both the performance and the complexity of the proposed algorithm are controlled by two parameters.Therefore,there is a trade-off between the performance and the complexity in the proposed algorithm.Computer simulations show that the decoding performance of the proposed method is greatly improved.

关 键 词：交织检测解码 多输入多输出 球形解码 最大后验概率译码 

分 类 号：TN929.5[电子电信—通信与信息系统]