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Outage Analysis of Cognitive Two-Way Relaying Network with Physical-Layer Network Coding in Nakagami-m Fading Channels

Jia Liu1, Guixia Kang2, Ying Zhu1,3, and Ping Xie1
1.Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, P.R.China
2.Wireless Technology Innovation (WTI) Institute, Beijing University of Posts and Telecommunications, Beijing 100876, P.R.China
3.Department of Teaching and Practicing, Guilin University of Electronic Technology, Guilin 541004, P.R.China

Abstract—In spectrum sharing systems, a secondary user (SU) is permitted to share frequency bands with primary user (PU) as long as its transmission does not interfere with the PU’s communication. In this paper, the outage probability is investigated for the physical-layer network coding (PNC) based cognitive two-way relay network over Nakagami-m fading channel. By applying the interference temperature (IT) constraints at the transceiver nodes and relay nodes in secondary systems, we analyze the outage performance in underlay spectrum sharing with the best relay selection criterion. The cumulative distribution function (CDF) of the signal to noise ratio (SNR) for each link is derived to obtain the tight upper bound on the outage probability of the secondary relay system. Simulations results demonstrate the validity and accuracy of the theoretical analysis

Index Terms—Cognitive two-way relay network, physical layer network coding, outage probability, Nakagami-m fading channel

Cite: Jia Liu, Guixia Kang, Ying Zhu, and Ping Xie, "Outage Analysis of Cognitive Two-Way Relaying Network with Physical-Layer Network Coding in Nakagami-m Fading Channels" Journal of Communications, vol. 8, no. 7, pp. 421-427, 2013. doi:10.12720/jcm.8.7.421-427