LTE-A上行链路中单用户MIMO的球形译码算法性能分析  

Performance Analysis of Sphere Decoding Algorithms for Single-user MIMO in LTE-A Uplink

作　　者：张源[1,2] 沈皓[1] 赵昆[1] 夏斌[2] 

机构地区：[1]上海贝尔股份有限公司,上海201206 [2]上海交通大学电子工程系,上海200240

出　　处：《电讯技术》2015年第1期33-38,共6页Telecommunication Engineering

基　　金：国家科技重大专项(2012ZX03001010)~~

摘　　要：多输入多输出(MIMO)系统的接收端需要有效的检测算法以处理衰落和空间复用干扰等削弱效应,而算法的性能和复杂度等特性会随不同的应用场景有所变化,因而从这些角度评估和比较不同算法对于MIMO系统的实现具有重要意义。针对LTE-A上行链路中单用户MIMO的应用场景,通过分析现有文献中的球形译码(SD)算法及相关方法,以及对工程可实现性的考量,引入了一种将基于单树搜索的SD与迭代干扰消除结合运用的实现方案,并在遵循3GPP标准的上行仿真平台中对其进行了性能评估,观察了SD相对于MMSE的性能增益及相关趋势,进而为SD算法的工程实现提供参考依据。To deal with weakening effects such as fading and spatial multiplexing interference,the receiverof a multiple-input multiple-output（MIMO） system needs effective detection algorithm,while the algo-rithm＇s characteristics such as performance and complexity will vary depending on the application scenar-io. Therefore,it is of importance for the implementation of MIMO systems to evaluate and compare differentalgorithms in these aspects. For the scenario of single-user MIMO in the uplink of LTE-A,this paper intro-duces an implementation scheme for sphere decoding（SD） algorithms,based on single-tree search and it-erative interference cancellation,through the analysis of the SD algorithms in existing literatures and relatedmethods,with the engineering implementability taken into account. Through performance evaluation in anuplink simulation platform compliant with 3GPP standards,the performance gain of SD compared with thatof minimum mean square error（MMSE） and its relative trends are observed,thereby providing guidelinesfor engineering implementation of SD algorithms.

关 键 词：LTE-ADVANCED 单载波频分多址 多输入多输出 球形译码 信号检测 性能分析 

分 类 号：TN919.1[电子电信—通信与信息系统]