Simultaneous Wireless Information and Power Transfer for MIMO Amplify-and-Forward Relay Systems

Fatma Benkhelifa, Mohamed-Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review


In this paper, we investigate two-hop Multiple- Input Multiple-Output (MIMO) Amplify-and-Forward (AF) relay communication systems with simultaneous wireless information and power transfer (SWIPT) at the multi-antenna energy harvesting relay. We derive the optimal source and relay covariance matrices to characterize the achievable region between the source-destination rate and the harvested energy at the relay, namely Rate-Energy (R-E) region. In this context, we consider the ideal scenario where the energy harvester (EH) receiver and the information decoder (ID) receiver at the relay can simultaneously decode the information and harvest the energy at the relay. This scheme provides an outer bound for the achievable R-E region since practical energy harvesting circuits are not yet able to harvest the energy and decode the information simultaneously. Then, we consider more practical schemes which are the power splitting (PS) and the time switching (TS) proposed in [1] and which separate the EH and ID transfer over the power domain and the time domain, respectively. In our study, we derive the boundary of the achievable R- E region and we show the effect of the source transmit power, the relay transmit power and the position of the relay between the source and the destination on the achievable R-E region for the ideal scenario and the two practical schemes.
Original languageEnglish
Title of host publicationIEEE Global Communications Conference (GLOBECOM)
Number of pages6
ISBN (Electronic)978-1-4799-5952-5
Publication statusPublished - 25 Feb 2016
Externally publishedYes
Event2015 IEEE Global Communications Conference - San Diego, United States
Duration: 6 Dec 201510 Dec 2015


Conference2015 IEEE Global Communications Conference
Abbreviated title(GLOBECOM)
Country/TerritoryUnited States
CitySan Diego


  • Relays
  • Receivers
  • Covariance matrices
  • MIMO
  • Niobium
  • Wireless communication
  • Energy harvesting


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