naa a22 4500 510798462 CHVBK 20180411083345.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1190-0 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1190-0 Performance Analysis and Enhancement for Opportunistic Analog Network Coding with Imperfect CSI [Elektronische Daten] [Chensi Zhang, Jianhua Ge, Jing Li] Imperfect channel state information (CSI) is among the main factors that affect system performance in wireless networks. In this paper, we investigate the impact of imperfect CSI on the performance of analog network coding (ANC) for a two-way relaying system based on opportunistic relay selection (ORS). An exact and generalized closed-form expression for system outage probability is presented in a Rayleigh flat-fading environment. To provide more insights, the closed-form asymptotic expression is then obtained. It is shown that the presence of channel estimation error causes outage probability maintain a fixed level even when a noiseless channel is adopted. Therefore, to mitigate the negative impact of imperfect CSI, we deduce the power allocation to minimize the system outage probability based on the knowledge of instantaneous channel information. Numerical results validate the accuracy of the derived expressions and highlight the effect of proposed power allocation algorithm compared with conventional uniform power allocation. Springer Science+Business Media New York, 2013 Analog network coding (ANC) nationallicence Two-way relay nationallicence Outage probability nationallicence Relay selection nationallicence Imperfect channel state information (CSI) nationallicence Zhang Chensi The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut Ge Jianhua The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut Li Jing The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2945-2956 0929-6212 72:4<2945 2013 72 11277 https://doi.org/10.1007/s11277-013-1190-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1190-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Chensi The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut NATIONALLICENCE 700 1- Ge Jianhua The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut NATIONALLICENCE 700 1- Li Jing The State Key Laboratory of Integrated Service Networks (ISN), Xidian University, Xi'an, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2945-2956 0929-6212 72:4<2945 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer