Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system

doi:10.1016/S1005-8885(13)60093-X

中国邮电高校学报(英文) ›› 2013, Vol. 20 ›› Issue (5): 79-84.doi: 10.1016/S1005-8885(13)60093-X

Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system

刘健,纪红,张晓亮,李曦

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2013-04-02 修回日期:2013-06-03 出版日期:2013-10-30 发布日期:2013-10-29
通讯作者: 刘健 E-mail:liujian8895@bupt.edu.cn
基金资助:
This work was supported by the National Science and Technology Major Project (2011ZX03001-007-03), the National Natural Science Foundation of China (61271182), and the Fundamental Research Funds for the Central Universities (2013RC0112).

Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-04-02 Revised:2013-06-03 Online:2013-10-30 Published:2013-10-29
Contact: Jian Liu E-mail:liujian8895@bupt.edu.cn
Supported by:
This work was supported by the National Science and Technology Major Project (2011ZX03001-007-03), the National Natural Science Foundation of China (61271182), and the Fundamental Research Funds for the Central Universities (2013RC0112).

摘要/Abstract

摘要： Orthogonal frequency division multiplexing (OFDM) which has been adopted in the long-term evolution (LTE) system can improve the system capacity obviously. However, it also brings about severe inter-cell interference (ICI) for cell-edge users (CEUs). To tackle this problem, multi-user selection and power control (MuS-PC) is proposed as an efficient scheme in uplink coordinated multi-point multi-user multi-input multi-output (CoMP-MU-MIMO) transmission/reception. This paper jointly considers user’s signal to interference plus noise ratio (SINR) and proportional fairness (PF) to maximize the total channel capacity in multi-user selection by formulating a penalty function. To simplify the penalty function’s computation, particle swarm optimization (PSO) algorithm is introduced. In addition, power control is adopted to maximize overall energy efficiency. Simulation results demonstrate that the MuS-PC scheme can not only obtain the optimal total channel capacity while guarantee each user’s quality of service (QoS) and PF, but also largely reduce computational complexity and improve energy efficiency. As a result, the poor communication quality of CEUs can be enhanced.

关键词: CoMP-MU-MIMO system, PSO algorithm, penalty function, multi-user selection, power control, zero forcing (ZF) equalization

Abstract: Orthogonal frequency division multiplexing (OFDM) which has been adopted in the long-term evolution (LTE) system can improve the system capacity obviously. However, it also brings about severe inter-cell interference (ICI) for cell-edge users (CEUs). To tackle this problem, multi-user selection and power control (MuS-PC) is proposed as an efficient scheme in uplink coordinated multi-point multi-user multi-input multi-output (CoMP-MU-MIMO) transmission/reception. This paper jointly considers user’s signal to interference plus noise ratio (SINR) and proportional fairness (PF) to maximize the total channel capacity in multi-user selection by formulating a penalty function. To simplify the penalty function’s computation, particle swarm optimization (PSO) algorithm is introduced. In addition, power control is adopted to maximize overall energy efficiency. Simulation results demonstrate that the MuS-PC scheme can not only obtain the optimal total channel capacity while guarantee each user’s quality of service (QoS) and PF, but also largely reduce computational complexity and improve energy efficiency. As a result, the poor communication quality of CEUs can be enhanced.

Key words: CoMP-MU-MIMO system, PSO algorithm, penalty function, multi-user selection, power control, zero forcing (ZF) equalization

LIU Jian LI Xi JI Hong ZHANG Xiao-liang. Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system[J]. Acta Metallurgica Sinica(English letters), 2013, 20(5): 79-84.

参考文献

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Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system

Multi-user selection based on particle swarm optimization and power control scheme in the uplink CoMP-MU-MIMO system

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