Network beamforming in energy-harvesting relay networks

Dexin Wang, Rongqing Zhang, Xiang Cheng, Liuqing Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In wireless-powered cooperative communication networks with multiple energy harvesting relays, relay selection has been the solution to exploit the cooperative diversity in the literature. In this paper, we propose to employ network beamforming (NB) in such networks to improve the source-to-destination capacity and reliability. More specifically, we propose a NB scheme with jointly optimized power splitting (PS) factors. To obtain the global optimum efficiently, semidefinite relaxation is used to convert the optimization problem to a quasi-convex one. To further reduce the communication overhead, we also propose a sub-optimal NB scheme with distributed PS factor optimization that requires only local channel state information. The performance gains of our proposed schemes compared with relay selection are demonstrated by simulations.

Original languageEnglish (US)
Title of host publication2019 IEEE/CIC International Conference on Communications in China, ICCC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages25-29
Number of pages5
ISBN (Electronic)9781728107325
DOIs
StatePublished - Aug 2019
Externally publishedYes
Event2019 IEEE/CIC International Conference on Communications in China, ICCC 2019 - Changchun, China
Duration: Aug 11 2019Aug 13 2019

Publication series

Name2019 IEEE/CIC International Conference on Communications in China, ICCC 2019

Conference

Conference2019 IEEE/CIC International Conference on Communications in China, ICCC 2019
CountryChina
CityChangchun
Period8/11/198/13/19

Keywords

  • Energy harvesting relay
  • Network beamforming
  • Power splitting
  • SWIPT

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