Opportunistic scheduling for multi-user two-way relay systems with physical network coding

Youngil Jeon, Young Tae Kim, Moonseo Park, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

This letter considers a multi-user wireless communication system employing physical network coding (PNC), where a pair of users communicates with each other via a relay. To attain reliable communication over time varying channels, we apply an opportunistic scheduling scheme for the PNC to both the broadcast channel phase and the multiple access channel phase. We propose two criteria for selecting users based on the channel norm and the minimum distance. Also, an efficient method to compute the minimum distance for superposed QPSK signals is introduced. Simulation results show that the proposed scheduling for PNC provides a significant improvement over conventional schemes.

Original languageEnglish
Article number6153329
Pages (from-to)1290-1294
Number of pages5
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number4
DOIs
Publication statusPublished - 2012 Apr

Bibliographical note

Funding Information:
Manuscript received June 23, 2011; revised November 1, 2011 and January 7, 2012; accepted January 12, 2012. The associate editor coordinating the review of this paper and approving it for publication was J. Luo. Y. Jeon, Y.-T. Kim, and I. Lee are with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: {dreamdx, reftm, inkyu}@korea.ac.kr). M. Park was with the School of Electrical Engineering, Korea University, Seoul, Korea. He is now with the Department of Electronics Engineering, Ewha Womans University, Seoul, Korea (e-mail: moonseo.park@ewha.ac.kr). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0017909). A part of this work was presented at the IEEE Vehicular Technology Conference (VTC), Budapest, Hungary, May 2011 Digital Object Identifier 10.1109/TWC.2012.021412.111189

Keywords

  • Physical network coding
  • opportunistic scheduling
  • two-way relay systems

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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