An Improved Semi-Orthogonal User Selection Algorithm Based on Condition Number for Multiuser MIMO Systems  

作　　者：LU Xinlu WU Jun HUANG Xinlin LI Wenfeng LU Jianmin GONG Zhengwei 

机构地区：[1]ComputerScienceandTechnologyDepartment,TongjiUniversity,Shanghai201804,China [2]HuaweiTechnologiesCo.,Ltd,Shanghai201206,China

出　　处：《China Communications》2014年第A01期23-30,共8页中国通信（英文版）

基　　金：This paper was supported by the National Natural Science Foundation of China under Grant No.61390513 and 61201225,and National Science and Technology Major Project of China under Grant No.2013ZX03003004,the Natural Science Foundation of Shanghai under Grant No.12ZR1450800,and sponsored by Shanghai Pujiang Program under Grant No.13PJD030.It was also supported by the Fundamental Research Funds for the Central Universities under Grant No.20140767,the Program for Young Excellent Talents in Tongji University under Grant No.2013KJ007,and 'Chen Guang' project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation under Grant No.13CG18

摘　　要：In Multiple-Input Multiple-Out （MIMO） systems, the user selection algorithm plays an important role in the realization of multiplexing gain. In this paper, an improved Semi-orthogonal User Selection algorithm based on condition number is proposed. Besides, a new MIMO pre- coding scheme is designed. The proposed SUS- CN （SUS with condition number） algorithm outperforms the SUS algorithm for the selection of users with better matrix inversion property, thus a higher information rate for selected user pair is achieved. The designed MIMO precoding matrix brings benefits of the power equality at transmitted terminals, the limited dynamic range of the power over time, and a better power efficiency. The simulation results give the key insights into the im- pact of the different condition number value and users on the sum-rate capacity.

关 键 词：Multiple-Input Multiple-Output sumrate capacity condition number semi-orthogonaluser selection 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TP301.6[自动化与计算机技术—控制科学与工程]