Energy Efficient Power Allocation Scheme for Distributed Antenna Systems with Target BER Constraint

• Published in: China communications Vol. 13; no. 11; pp. 234 - 243
• Main Authors: Yu, Xiangbin, Wang, Ying, Qiuming Zhu, Tao Dong, Junya Chu
• Format: Journal Article
• Language: English
• Published: China Institute of Communications 01.11.2016; Jiangsu Key Laboratory of Internet of Things and Control Technologies, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics Nanjing, 210016, China%Shenzhen Research Institute, Nanjing University, Shenzhen 518057, China
• Subjects: distributed antenna system; energy efficiency; Linear programming; Multiaccess communication; path loss; power allocation; shadow fading; target bit error rate (ber); Wireless communication; 传输速率; 分布式天线系统; 分配方案; 有效功率; 服务质量; 瑞利衰落信道; 能量; 误码率; distributed antenna system; power allocation; shadow fading; target bit error rate (ber); path loss; energy efficiency
• ISSN: 1673-5447
• DOI: 10.1109/CC.2016.7781734

The energy efficiency（EE） of distributed antenna system with quality of service（Qo S） requirement is investigated over composite Rayleigh fading channel,where the shadow fading,path loss and Rayleigh fading are all considered. Our aim is to maximize the EE which is defined as the ratio of the transmission rate to the total consumed power subject to the maximum transmit power of each remote antenna constraint and Qo S（target BER） requirement. According to the definition of EE and using the upper bound of average EE,the optimized objective function is provided. Based on this,utilizing Karush-KuhnTucker conditions and numerical calculation,a suboptimal energy efficient power allocation（PA） scheme is developed,and the closedform expression of PA coefficients is derived. The scheme may obtain the EE performance close to the existing optimal scheme. Moreover,it has relatively lower complexity than the existing scheme because only the statistic channel information and less iteration are required. Simulation results show the presented scheme is valid and can meet the target BER requirement,and the EE can be increased as target BER requirement decreases.