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Outage performance of cognitive relay networks with wireless information and power transfer

Research output: Contribution to journalJournal article

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  • Zheng Yang
  • Zhiguo Ding
  • Pingzhi Fan
  • George K. Karagiannidis
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<mark>Journal publication date</mark>12/05/2016
<mark>Journal</mark>IEEE Transactions on Vehicular Technology
Issue number5
Volume65
Number of pages6
Pages (from-to)3828-3833
Publication statusPublished
Early online date11/06/15
Original languageEnglish

Abstract

In this paper, we consider underlay cognitive radio (CR) networks with one primary receiver, one cognitive transmitter-receiver pair, and one energy harvesting relay. The transmission power of the secondary source is opportunistically determined by its interference to the primary receiver, and the relay transmission is powered by the energy harvested from the radio-frequency observations at the relay. For the considered CR networks with simultaneous wireless information and power transfer (SWIPT), we derive analytical expressions for the outage probability, as well as their high signal-to-noise ratio (SNR) approximations in closed form. The developed analytical results demonstrate that the use of SWIPT will not cause any loss in diversity gain, but the outage probability achieved by the SWIPT-CR scheme asymptotically decays as log SNR/SNR, whereas a decaying rate of 1/SNR is achieved by a conventional CR network. Computer simulation results are also provided to demonstrate the accuracy of the presented analysis.

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©2015 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.