Sensors (Nov 2021)

Outage Analysis of the Power Splitting Based Underlay Cooperative Cognitive Radio Networks

  • Phu Tran Tin,
  • Van-Duc Phan,
  • Tan N. Nguyen,
  • Lam-Thanh Tu,
  • Bui Vu Minh,
  • Miroslav Voznak,
  • Peppino Fazio

DOI
https://doi.org/10.3390/s21227653
Journal volume & issue
Vol. 21, no. 22
p. 7653

Abstract

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In the present paper, we investigate the performance of the simultaneous wireless information and power transfer (SWIPT) based cooperative cognitive radio networks (CCRNs). In particular, the outage probability is derived in the closed-form expressions under the opportunistic partial relay selection. Different from the conventional CRNs in which the transmit power of the secondary transmitters count merely on the aggregate interference measured on the primary networks, the transmit power of the SWIPT-enabled transmitters is also constrained by the harvested energy. As a result, the mathematical framework involves more correlated random variables and, thus, is of higher complexity. Monte Carlo simulations are given to corroborate the accuracy of the mathematical analysis and to shed light on the behavior of the OP with respect to several important parameters, e.g., the transmit power and the number of relays. Our findings illustrate that increasing the transmit power and/or the number of relays is beneficial for the outage probability.

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