Power allocation scheme for channel capacity maximization in multi-relay amplify-and-forward cooperative system

doi:10.12733/jics20105383

IR > 理学院

	Power allocation scheme for channel capacity maximization in multi-relay amplify-and-forward cooperative system
	Li, Suoping1 ; Zou, Xuewei 2; Yan, Lifu 2
	2015-03-01
发表期刊	Journal of Information and Computational Science
ISSN	15487741
卷号	12 期号:4 页码:1365-1372
摘要	This paper considers the power allocation problem for multi-relay amplify-and-forward cooperative system. Under the condition of the total power constraint, the power allocation scheme to maximize the channel capacity is proposed. We get a non-closed-form solution of this scheme by constructing a Lagrange function and making use of KKT conditions, and its numerical solution also was obtained based on binary search algorithm. Theoretical analysis and simulations show that the proposed scheme greatly can improve the system performance than the traditional equal power allocation scheme in Rayleigh channel, and that the system with multi-relay has more capacity than the system with only a direct link. We also discuss how the system's total power, the number or the position of relay and the power allocation ratio affect the system's channel capacity. Numerical results show that there always exits the optimal number and position of relays, and power allocation ratio to maximize the channel capacity for a certain communication scheme. But when the relay's number reaches to a certain constant, adding relays will only result in the configuration complexity without bringing more gain for the system. ©, 2015, Binary Information Press
关键词	Beamforming Lagrange multipliers Learning algorithms Amplify and forward Analysis and simulation Binary search algorithm Communication schemes Equal power allocation Lagrange functions Power allocation ratios Power allocations
DOI	10.12733/jics20105383
收录类别	EI
语种	英语
出版者	Binary Information Press
EI入藏号	20151300678612
EI主题词	Channel capacity
EI分类号	713 Electronic Circuits - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 731 Automatic Control Principles and Applications - 732 Control Devices - 921 Mathematics
来源库	Compendex
分类代码	713 Electronic Circuits - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 731 Automatic Control Principles and Applications - 732 Control Devices - 921 Mathematics
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112417
专题	理学院
作者单位	1.School of Science, Lanzhou University of Technology, Lanzhou, China; 2.School of Computer and Communication, Lanzhou University of Technology, Lanzhou, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Li, Suoping,Zou, Xuewei,Yan, Lifu. Power allocation scheme for channel capacity maximization in multi-relay amplify-and-forward cooperative system[J]. Journal of Information and Computational Science,2015,12(4):1365-1372.
APA	Li, Suoping,Zou, Xuewei,&Yan, Lifu.(2015).Power allocation scheme for channel capacity maximization in multi-relay amplify-and-forward cooperative system.Journal of Information and Computational Science,12(4),1365-1372.
MLA	Li, Suoping,et al."Power allocation scheme for channel capacity maximization in multi-relay amplify-and-forward cooperative system".Journal of Information and Computational Science 12.4(2015):1365-1372.