Uplink resource allocation in OFDMA system using distributed antennas  

作　　者：YAN JiLei LI JianDong ZHAO LinJing SHI Hua 

机构地区：[1]Broadband Wireless Communications Laboratory, Information Science Institute, State Key Laboratory of Integrated Services Networks, Xidian University

出　　处：《Science China(Information Sciences)》2013年第12期293-298,共6页中国科学（信息科学）（英文版）

基　　金：supported in part by Key Project of National Natural Science Foundation of China (Grant No. 61231008);National Basic Research Program of China (Grant No. 2009CB320404);National Natural Science Foundation of China (Grant Nos. 60902032, 61301168);National Science and Technology Major Specific Project of China (Grant No. 2010ZX03005-003);111 Project (Grant No. B08038)

摘　　要：In this article, we investigate uplink resource allocation in orthogonal frequency division multiple access （OFDMA） systems that use distributed antennas. The multiple distributed receiving antennas motivate us to exploit the spatial diversity to maximize the achievable rate of the system. Given constraints on the subcarrier allocation and the power limit of each user equipment （UE）, a mixed-integer optimization problem is formulated. We first propose a centralized greedy algorithm to find the maximum achievable rate of the system. Then a heuristic algorithm is proposed that can be implemented in a distributed manner. Simulation results show that the heuristic algorithm can approximately achieve the maximum achievable rate of the system and result in significant system performance improvement over the approach assigning one user to each subcarrier.In this article, we investigate uplink resource allocation in orthogonal frequency division multiple access （OFDMA） systems that use distributed antennas. The multiple distributed receiving antennas motivate us to exploit the spatial diversity to maximize the achievable rate of the system. Given constraints on the subcarrier allocation and the power limit of each user equipment （UE）, a mixed-integer optimization problem is formulated. We first propose a centralized greedy algorithm to find the maximum achievable rate of the system. Then a heuristic algorithm is proposed that can be implemented in a distributed manner. Simulation results show that the heuristic algorithm can approximately achieve the maximum achievable rate of the system and result in significant system performance improvement over the approach assigning one user to each subcarrier.

关 键 词：uplink OFDMA system distributed antennas subcarrier assignment power allocation heuristicalgorithm 

分 类 号：TN820[电子电信—信息与通信工程] TN929.531