Performance Analysis of Optimal Power Allocation in Wireless Cooperative Communication Systems

被引:0
作者
Adam, Edriss Eisa Babikir [1 ]
Samb, Doudou [1 ]
Yu, Li [1 ]
机构
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Div Commun & Intelligent Networks, Wuhan 430074, Peoples R China
来源
INTERNATIONAL CONFERENCE ON GRAPHIC AND IMAGE PROCESSING (ICGIP 2012) | 2013年 / 8768卷
关键词
Wireless communication; Amplify-and-Forward; Symbol error rate; power allocation; DIVERSITY; PROTOCOLS; NETWORKS; CAPACITY;
D O I
10.1117/12.2010525
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Cooperative communication has been recently proposed in wireless communication systems for exploring the inherent spatial diversity in relay channels. The Amplify-and-Forward (AF) cooperation protocols with multiple relays have not been sufficiently investigated even if it has a low complexity in term of implementation. We consider in this work a cooperative diversity system in which a source transmits some information to a destination with the help of multiple relay nodes with AF protocols and investigate the optimality of allocating powers both at the source and the relays system by optimizing the symbol error rate (SER) performance in an efficient way. Firstly we derive a closed-form SER formulation for MPSK signal using the concept of moment generating function and some statistical approximations in high signal to noise ratio (SNR) for the system under studied. We then find a tight corresponding lower bound which converges to the same limit as the theoretical upper bound and develop an optimal power allocation (OPA) technique with mean channel gains to minimize the SER. Simulation results show that our scheme outperforms the equal power allocation (EPA) scheme and is tight to the theoretical approximation based on the SER upper bound in high SNR for different number of relays.
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收藏
页数:6
相关论文
共 11 条
[1]   Power allocation for cooperative relaying in wireless networks [J].
Deng, XM ;
Haimovich, AM .
IEEE COMMUNICATIONS LETTERS, 2005, 9 (11) :994-996
[2]  
DoudouSamb, 2010, P IEEE 3 INT C COMP
[3]   Capacity of a class of relay channels with orthogonal components [J].
El Gamal, A ;
Zahedi, S .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2005, 51 (05) :1815-1817
[4]   Capacity bounds and power allocation for wireless relay channels [J].
Host-Madsen, A ;
Zhang, JS .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2005, 51 (06) :2020-2040
[5]  
Ikki S, 2007, IEEE COMMUN LETT, V11, P334, DOI 10.1109/LCOMM.2007.061947
[6]  
KRAMER G, 2003, P 41 ALL C COMM CONT
[7]   Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks [J].
Laneman, JN ;
Wornell, GW .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2003, 49 (10) :2415-2425
[8]   Cooperative diversity in wireless networks: Efficient protocols and outage behavior [J].
Laneman, JN ;
Tse, DNC ;
Wornell, GW .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2004, 50 (12) :3062-3080
[9]   Outage analysis and optimal power allocation for multinode relay networks [J].
Seddik, Karim G. ;
Sadek, Ahmed K. ;
Su, Weifeng ;
Liu, K. J. Ray .
IEEE SIGNAL PROCESSING LETTERS, 2007, 14 (06) :377-380
[10]  
Simon M. K, 2000, WILEY S TEL