Performance analysis of cooperative communication systems with imperfect channel estimation
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
End-to-end average BER in multihop wireless networks over fading channels
IEEE Transactions on Wireless Communications
Channel Estimation for Amplify and Forward Relay Based Cooperation Diversity Systems
IEEE Transactions on Wireless Communications
Outage Probability of Cognitive Relay Networks with Interference Constraints
IEEE Transactions on Wireless Communications
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Exact Outage Probability of Underlay Cognitive Cooperative Networks Over Rayleigh Fading Channels
Wireless Personal Communications: An International Journal
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This paper presents an analysis framework for performance evaluation of underlay cognitive decode-and-forward (DF) multi-hop systems over Rayleigh fading channel under imperfect channel information. Specifically, we derive the exact closed-form bit error rate (BER) and interference probability (i.e., the probability that the interference power constraint is invalid) expressions. The derived expressions are well supported by simulations and serve as useful tools for fast system performance evaluation under different aspects. To reduce the interference probability, we consider the back-off power control mechanism. Various results demonstrate the effect of channel information imperfection on the system performance and the trade-off between the interference probability and BER. Also, the performance of underlay cognitive DF multi-hop systems depends both network topology and the number of hops.