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Optimization of a robust collaborative-relay beamforming design for simultaneous wireless information and power transfer

  • Lu-lu Zhao
  • Xing-long Jiang
  • Li-min LiEmail author
  • Guo-qiang Zeng
  • Hui-jie Liu
Article
  • 14 Downloads

Abstract

We investigate a collaborative-relay beamforming design for simultaneous wireless information and power transfer. A non-robust beamforming design that assumes availability of perfect channel state information (CSI) in the relay nodes is addressed. In practical scenarios, CSI errors are usually inevitable; therefore, a robust collaborative-relay beamforming design is proposed. By applying the bisection method and the semidefinite relaxation (SDR) technique, the non-convex optimization problems of both non-robust and robust beamforming designs can be solved. Moreover, the solution returned by the SDR technique may not always be rank-one; thus, an iterative sub-gradient method is presented to acquire the rank-one solution. Simulation results show that under an imperfect CSI case, the proposed robust beamforming design can obtain a better performance than the non-robust one.

Key words

Simultaneous wireless information and power transfer Channel state information Robust beamforming Semidefinite relaxation Iterative sub-gradient 

CLC number

TN92 

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Copyright information

© Editorial Office of Journal of Zhejiang University Science and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina
  2. 2.Shanghai Engineering Center for MicrosatellitesShanghaiChina
  3. 3.College of Mathematics, Physics and Electronic Information EngineeringWenzhou UniversityWenzhouChina

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