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Outage Performance of Underlay Cognitive Opportunistic Multi-relay Networks in the Presence of Interference from Primary User |
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| Authors: | Ping Yang Qi Zhang Liping Luo Jiayin Qin |
| Affiliation: | 1. School of Information Science and Technology, Sun Yat-Sen University, Guangzhou, 510006, Guangdong, China 2. School of Electronic Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, China 3. School of Information Science and Engineering, Guangxi University for Nationalities, Nanning, 530006, Guangxi, China |
| Abstract: | In this paper, considering the interferences from primary transmitter to secondary receiver and from secondary transmitter to primary receiver, we derive the upper and lower bounds of outage probability for underlay cognitive opportunistic multi-relay networks. Theoretical and simulation results show the upper and lower bounds converge to the exact outage probability at high interference-to-noise (INR) region. Because the interference from primary transmitter to secondary receiver is considered, an outage floor at high signal-to-noise ratio (SNR) occurs when INR increases proportionally with SNR. |
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