Performance of Physical-Layer Network Coding in Asymmetric Two-Way Relay Channels

• Published in: China communications Vol. 10; no. 10; pp. 65 - 73
• Main Authors: Bo, Li, Gang, Wang, Chong, Peter H. J., Hongjuan, Yang, Guan, Yongliang, Xuejun, Sha
• Format: Journal Article
• Language: English
• Published: China Institute of Communications 01-10-2013; Communication Research Center,Harbin Institute of Technology,Harbin 150001,China%School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798
• Subjects: asymmetric channels; Binary phase shift keying; Bit error rate; Downlink; Network coding; physical-layer network coding; Relays; two-way relay channels; Uplink; Wireless communication; 上行链路; 不对称性; 中继信道; 性能; 比特错误率; 物理层; 网络编码; 计算机模拟; asymmetric channels; physical-layer network coding; two-way relay channels; bit error rate
• ISSN: 1673-5447
• DOI: 10.1109/CC.2013.6650320

In this paper, we study the performance of physical-layer network coding in asy- mmetric two-way relay channels using four different cases having different poor channels： phase asymmetry, downlink asymmetry, uplink asymmetry and node asymmetry. The decision and mapping rule for symmetric and asymmetric cases are studied. The performance in terms of bit error rate for each case will be studied and analysed by computer simulation. Analytical and simulation results show that uplink asymmetry is the worst case; intra-phase asymmetry and unreliable uplink channels will more severely affect the performance degradation, which is caused by channel asymmetry.