Transmitter-receiver collaborative-relay beamforming by simulated annealing

Authors:
Dong Zheng;Ju Liu;Lei Chen;Yuxi Liu;Weidong Guo
Affiliations:
Shandong University, Jinan, China;Shandong University, Jinan, China and Southeast University, Nanjing, China;Shandong University, Jinan, China;Shandong University, Jinan, China;Shandong University, Jinan, China
Venue:
ICSI'11 Proceedings of the Second international conference on Advances in swarm intelligence - Volume Part II
Year:
2011

Citing 3
Cited 0

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Abstract

This paper considers the collaborative-relay beamforming (CRBF) design for a three-hop multi-relay network with one transmitter, one receiver and two clusters of relay nodes. It is assumed that, all the relay nodes work synchronously with perfect channel state information (CSI). Optimization on the relay weights is carried out to improve the signal-to-noise ratio (SNR) at the receiver under aggregate power constraints of each cluster. Two different design approaches are proposed in this study. In the first approach, a simulated annealing (SA) based CRBF method is presented, and a stochastic global optimum is obtained. However, the SA algorithm is quite computational demanding. In order to speed up the heuristic searching process, a suboptimal but efficient closed-form solution is provided in the second approach, which helps to generate the initial state of the SA algorithm. Simulation results show that both approaches outperform the fixed power allocation strategy.