An adaptive cooperation diversity scheme with best-relay selection in cognitive radio networks

In this paper, an adaptive cooperation diversity scheme with best-relay selection is proposed for multiple-relay cognitive radio networks to improve the performance of secondary transmissions while ensuring the quality of service (QoS) of primary transmissions. Exact closed-form expressions of the outage probability of secondary transmissions, referred to as secondary outage probability, are derived under the constraint of satisfying a required outage probability of primary transmissions (primary outage probability) for both the traditional non-cooperation and the proposed adaptive cooperation schemes over Rayleigh fading channels. Numerical and simulation results show that, with a guaranteed primary outage probability, a floor of the secondary outage probability occurs in high signal-to-noise ratio (SNR) regions. Moreover, the outage probability floor of the adaptive cooperation scheme is lower than that of the non-cooperation scenario, which illustrates the advantage of the proposed ...

• Type: Journal
• Year: 2010
• Where: TSP
• Authors: YuLong Zou, Jia Zhu, Baoyu Zheng, Yu-Dong Yao
• Keywords: Adaptive Cooperation, Artificial Intelligence, Outage Probability, Primary Outage Probability, TSP 2010