Performance Analysis of SNR-Based Decode-and-Forward Opportunistic Relaying in the Presence of Cochannel Interference

Opportunistic relaying (OR) for cooperative communications has been proposed as a technique to provide remarkable gains in multiple-relay cooperative networks. In this paper, the authors study the effect of cochannel interference (CCI) in the decode-and-forward (DF) OR scheme under independent but not necessarily identically distributed (i.n.i.d) Rayleigh fading channels. In particular, the authors consider the OR scheme with a signal-to-noise ratio (SNR)-based selection criterion and with the destination-performing maximal ratio combining of the signals from the source and the best relay. The authors derive approximate but tight closed-form expressions for the outage probability (OP) of the SNR-based OR in the presence of CCI. Moreover, the authors investigate the asymptotic behavior of the OP of the SNR-based OR. The asymptotic OP for OR with a signal-to-interference-plus-noise ratio (SINR)-based selection criterion is also provided. The authors examine the diversity orders and coding gains of both criteria under CCI. The result shows that the SNR-based OR is more susceptible to interference at the relays than interference at the destination. The authors further analytically compare the SNR- and the SINR-based OR schemes. Finally, to verify the analytical results, Monte Carlo simulations are performed, in which more benefits can be gained by using the SINR-based OR when more relays are used.

• Record URL:
  • https://doi.org/10.1109/TVT.2013.2240025
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
• Supplemental Notes:
  • Copyright © 2016, IEEE.
• Authors:
  • Wu, Nien-En
  • Li, Hsueh-Jyh
• Publication Date: 2016-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 7244-7257
• Serial:
  • IEEE Transactions on Vehicular Technology
  • Volume: 65
  • Issue Number: 9
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 0018-9545
  • Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25

Subject/Index Terms

• TRT Terms: Coding systems; Radio relay systems; Signal to noise ratio; Transmission errors and interference; Transmission techniques
• Uncontrolled Terms: Fading channels (Wireless networks)
• Subject Areas: Data and Information Technology; Highways;

Filing Info

• Accession Number: 01614247
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 25 2016 9:50AM