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http://dx.doi.org/10.4218/etrij.13.0212.0211

SER-Based Relay Selection for Two-Way Relaying with Physical Layer Network Coding  

Li, Dandan (School of Computer and Information Technology, Beijing Jiaotong University)
Xiong, Ke (Department of Electrical Engineering, Tsinghua University, School of Computer and Information Technology, Beijing Jiaotong University)
Qiu, Zhengding (School of Computer and Information Technology, Beijing Jiaotong University)
Du, Guanyao (School of Computer and Information Technology, Beijing Jiaotong University)
Publication Information
ETRI Journal / v.35, no.2, 2013 , pp. 336-339 More about this Journal
Abstract
To enhance the symbol error rate (SER) performance of the two-way relay channels with physical layer network coding, this letter proposes a relay selection scheme, in which the relay with the maximal minimum distance between different points in its constellation among all relays is selected to assist two-way transmissions. We give the closed-form expression of minimum distance for binary phase-shift keying and quadrature phase-shift keying. Additionally, we design a low-complexity method for higher-order modulations based on look-up tables. Simulation results show that the proposed scheme improves the SER performance for two-way relay networks.
Keywords
Two-way relay; relay selection; SER; minimum distance; physical layer network coding (PNC);
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Times Cited By KSCI : 1  (Citation Analysis)
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