Effect of Co-channel Interference on Two-Way Untrustworthy Relay Selection


GÜNEŞ P.

Wireless Personal Communications, vol.114, no.3, pp.2171-2197, 2020 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 114 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.1007/s11277-020-07470-4
  • Journal Name: Wireless Personal Communications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC
  • Page Numbers: pp.2171-2197
  • Keywords: Co-channel interference, Intercept probability, Secrecy achievable sum rate, Secrecy outage probability, Throughput analysis, Two-way full-duplex relay
  • Istanbul Gelisim University Affiliated: Yes

Abstract

This study investigates the impact of co-channel interference on two-way untrustworthy relay selection over Rayleigh fading environment. The investigation considers that two source terminals make information exchange over J number of full-duplex based amplify-and-forward bi-directional untrustworthy relay in the presence of co-channel interference. In addition, limited number of friendly jammers generate artificial interference/noise signals to mitigate information leakage. So as to minimize the system overhead and also enhancing secrecy performance, the relay selection is made by means of max–min criteria, which is based on maximizing the minimum secrecy rate over the relay terminals. The system model fundamental performance limits are measured by means of secrecy outage probability, secrecy achievable sum rate, intercept probability, and secrecy throughput analysis metrics. According to Monte-Carlo based simulations and numerical results, the max–min based selection strategy achieves cooperative diversity order, which is equal to total number of possible paths, in high signal-to-noise ratio regimes. Results also reveal that the co-channel interference dominates the process of the information exchange and degrades the achievable cooperative diversity order from J to 0 and leads system coding gain losses on free-interference cases in high signal-to-noise ratio regimes.