A LOW-COMPLEXITY PORT SELECTION AND POWER ALLOCATION SCHEME IN DISTRIBUTION MIMO SYSTEMS  

作　　者：Zhang Ningbo Kang Guixia Guo Yanyan Zhang Ping 

机构地区：[1]Beijing University of Posts and Telecommunications, Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing 100876, P. R. China

出　　处：《Journal of Electronics(China)》2010年第2期145-150,共6页电子科学学刊（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China (863 Program,No.2006AA01Z272 and No.2006AA01Z283);Beijing Municipal Science & Technology Commission (No.D08080100620802)

摘　　要：Information theoretical results have shown that Distributed Antenna Systems (DAS) can obtain higher capacity than Co-located Antenna Systems (CAS). In this paper,we investigate a downlink port selection and power allocation scheme in Distributed Multiple-Input Multiple-Output (D-MIMO) systems,where Distributed Antenna (DA) ports randomly locate in the cell. The contri-bution of this paper can be summarized as two parts. Firstly,we analyze how antenna correlation af-fects power allocation in D-MIMO systems. Secondly,based on large scale fading and antenna corre-lation,a low-complexity port selection and power allocation scheme is proposed. In the proposed scheme,we take both large scale fading and antenna correlation into consideration. Moreover,User Equipment (UE) only needs to feedback the rank of transmit antenna correlation matrix,which will not increase system complexity too much. Simulation results verify the capacity improvement based on the proposed power allocation scheme.Information theoretical results have shown that Distributed Antenna Systems （DAS） can obtain higher capacity than Co-located Antenna Systems （CAS）. In this paper, we investigate a downlink port selection and power allocation scheme in Distributed Multiple-Input Multiple-Output （D-MIMO） systems, where Distributed Antenna （DA） ports randomly locate in the cell. The contribution of this paper can be summarized as two parts. Firstly, we analyze how antenna correlation affects power allocation in D-MIMO systems. Secondly, based on large scale fading and antenna correlation, a low-complexity port selection and power allocation scheme is proposed. In the proposed scheme, we take both large scale fading and antenna correlation into consideration. Moreover, User Equipment （UE） only needs to feedback the rank of transmit antenna correlation matrix, which will not increase system complexity too much. Simulation results verify the capacity improvement based on the proposed power allocation scheme.

关 键 词：Large scale fading Antenna correlation Port selection Power allocation 

分 类 号：TN92[电子电信—通信与信息系统]