电讯技术2017，Vol.57Issue(5)：497-504,8.DOI:10.3969/j.issn.1001-893x.2017.05.002
LTE虚拟MIMO系统中用户正交配对改进算法
Enhanced Orthogonal User Pairing Schemes in LTE Virtual MIMO System
摘要
Abstract
Virtual Multiple-Input Multiple-Output(V-MIMO),introduced by the 3rd Generation Partnership Project(3GPP),is a promising up-link technology that can improve the spectrum efficiency and performance of wireless transmission in Long Term Evolution(LTE) systems.The key technique of V-MIMO is the user pairing algorithm.In this paper,the existing orthogonal pairing scheme with undesirable performance due to its misjudgment of orthogonality between users is theoretically analyzed and a more general definition of orthogonality is proposed.As LTE-Advanced supports up to 4 data streams in up-link and 8 data streams in down-link,this paper presents the extension from 2 users pairing to multiple users pairing by using greedy strategy in orthogonal pairing algorithm.To further improve the performance while guaranteeing low complexity,a norm based orthogonal pairing algorithm using greedy strategy is proposed.Simulation results and complexity analysis show that this algorithm achieves comparable system performance to the optimal pairing scheme while possessing much lower complexity,which is of great significance for the development of V-MIMO technology.关键词
LTE系统/虚拟多输入多输出/正交配对/贪婪思想Key words
LTE system/virtual MIMO/orthogonal pairing/greedy strategy分类
信息技术与安全科学引用本文复制引用
李相思,冯穗力,丁跃华,唐玮俊..LTE虚拟MIMO系统中用户正交配对改进算法[J].电讯技术,2017,57(5):497-504,8.基金项目
国家自然科学基金资助项目(61401157) （61401157）
广东省科技计划项目(2016A010101009) （2016A010101009）
