Efficient Power Allocation for Fixed-Gain Amplify-and-Forward Relaying in Rayleigh Fading Conference Paper uri icon

abstract

  • In this paper, we study power allocation strategies for a fixed-gain amplify-and-forward relay network employing multiple relays. We consider two optimization problems for the relay network: 1) optimal power allocation to maximize the end-to-end signal-to-noise ratio (SNR) and 2) minimizing the total consumed power while maintaining the end-to-end SNR over a threshold value. We assume that the relays have knowledge of only the channel statistics of all the links. We show that the SNR maximization problem is concave and the power minimization problem is convex. Hence, we solve the problems through convex programming. Numerical results show the benefit of allocating power optimally rather than uniformly.

name of conference

  • 2013 IEEE International Conference on Communications Workshops (ICC)

published proceedings

  • 2013 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (IEEE ICC)

author list (cited authors)

  • Zafar, A., Radaydeh, R. M., Chen, Y., & Alouini, M.

citation count

  • 3

complete list of authors

  • Zafar, Ammar||Radaydeh, Redha M||Chen, Yunfei||Alouini, Mohamed-Slim

publication date

  • January 2013