Multi-user two-way relaying in the presence of co-channel interference


ÖZDURAN V. , Soleimani-Nasab E.

IET COMMUNICATIONS, cilt.14, sa.21, ss.3853-3865, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Konu: 21
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1049/iet-com.2020.0170
  • Dergi Adı: IET COMMUNICATIONS
  • Sayfa Sayıları: ss.3853-3865

Özet

This study investigates the impact of co-channel interference caused by external terminals on multi-user bi-directional amplify-and-forward based wireless relaying network. The investigation considers multi-user pair and a single bi-directional relay terminal and a finite number of co-channel interference in the system model. A lower bound on the end-to-end outage probability is derived for the simultaneous transmission and the opportunistic source-pair selection strategy. According to analytical, asymptotic, and Monte-Carlo based computer simulation results, the opportunistic source-pair selection strategy achieves a near-optimal performance for the inter-cell interference caused by other user-pairs within the system. Results also show that the opportunistic source-pair selection strategy also achieves optimal diversity order, which is equal to N, in high signal-to-noise ratio regimes. Results also show that the co-channel interference degrades the achievable diversity order from N to 0 while also affecting the system coding gain.