TY - JOUR
T1 - Energy-Efficient Power Allocation for Fixed-Gain Amplify-and-Forward Relay Networks with Partial Channel State Information
AU - Zafar, Ammar
AU - Alouini, Mohamed-Slim
AU - Chen, Yunfei
AU - Radaydeh, Redha Mahmoud Mesleh
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2012/8/6
Y1 - 2012/8/6
N2 - In this letter, energy-efficient transmission and power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information (CSI) are studied. In the energy-efficiency problem, the total power consumed is minimized while keeping the signal-to-noise-ratio (SNR) above a certain threshold. In the dual problem of power allocation, the end-to-end SNR is maximized under individual and global power constraints. Closed-form expressions for the optimal source and relay powers and the Lagrangian multiplier are obtained. Numerical results show that the optimal power allocation with partial CSI provides comparable performance as optimal power allocation with full CSI at low SNR. © 2012 IEEE.
AB - In this letter, energy-efficient transmission and power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information (CSI) are studied. In the energy-efficiency problem, the total power consumed is minimized while keeping the signal-to-noise-ratio (SNR) above a certain threshold. In the dual problem of power allocation, the end-to-end SNR is maximized under individual and global power constraints. Closed-form expressions for the optimal source and relay powers and the Lagrangian multiplier are obtained. Numerical results show that the optimal power allocation with partial CSI provides comparable performance as optimal power allocation with full CSI at low SNR. © 2012 IEEE.
UR - http://hdl.handle.net/10754/244153
UR - http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6261329
UR - http://www.scopus.com/inward/record.url?scp=84871091515&partnerID=8YFLogxK
U2 - 10.1109/WCL.2012.080112.120318
DO - 10.1109/WCL.2012.080112.120318
M3 - Article
SN - 2162-2337
VL - 1
SP - 553
EP - 556
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 6
ER -