TY - JOUR
T1 - Opportunistic scheduling for multi-user two-way relay systems with physical network coding
AU - Jeon, Youngil
AU - Kim, Young Tae
AU - Park, Moonseo
AU - Lee, Inkyu
N1 - 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
PY - 2012/4
Y1 - 2012/4
N2 - 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.
AB - 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.
KW - Physical network coding
KW - opportunistic scheduling
KW - two-way relay systems
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U2 - 10.1109/TWC.2012.021412.111189
DO - 10.1109/TWC.2012.021412.111189
M3 - Article
AN - SCOPUS:84862826603
VL - 11
SP - 1290
EP - 1294
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 4
M1 - 6153329
ER -