Title :
Outage Performance of Statistical CSI Assisted Cognitive Relay with Interference from Primary User
Author :
Xinrong Guan ; Weiwei Yang ; Yueming Cai
Author_Institution :
Dept. of Wireless Commun., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
This work has studied the outage performance of amplify-and-forward (AF) relaying in underlay spectrum sharing systems with interference from primary user (PU). To reduce the complexity and improve the feasibility, two schemes using statistical channel state information (CSI) of interference links are proposed. For each scheme, the closed-form expressions for outage probability of secondary user (SU) and PU are derived, as well as the asymptotic expressions and diversity order. The impact of using statistical CSI instead of instantaneous CSI has been evaluated through the comparison with existing scheme. The analytical results and the simulation results are in excellent agrement confirming the effectiveness of the analysis in this work.
Keywords :
amplify and forward communication; cognitive radio; interference (signal); probability; relay networks (telecommunication); statistical analysis; amplify and forward relaying; diversity order; instantaneous CSI; interference links; outage performance; outage probability; primary user; secondary user; statistical CSI assisted cognitive relay; statistical channel state information; underlay spectrum sharing system; Complexity theory; Gain; Interference; Probability; Relays; Signal to noise ratio; Simulation; AF relay; interference; outage probability; statistical CSI; underlay spectrum sharing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.060513.130882