Outage Performance and Cooperative Diversity Under Amplify and Forward Relaying in Cognitive Radio Networks

Authors:
Qian Wang;Dian-Wu Yue;Francis C. Lau
Affiliations:
Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, Australia;College of Information Science and Technology, Dalian Maritime University, Dalian, China and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China;Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

Citing 11
Cited 0

NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey

Computer Networks: The International Journal of Computer and Telecommunications Networking
Cognitive legacy networks via cooperative diversity

IEEE Communications Letters
Relay based cooperative spectrum sensing in cognitive radio networks

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Exact symbol error probability of a Cooperative network in a Rayleigh-fading environment

IEEE Transactions on Wireless Communications
Cooperative Spectrum Sensing in Cognitive Radio, Part I: Two User Networks

IEEE Transactions on Wireless Communications
Cooperative Spectrum Sensing in Cognitive Radio, Part II: Multiuser Networks

IEEE Transactions on Wireless Communications
Distributed data fusion over correlated log-normal sensing and reporting channels: Application to cognitive radio networks

IEEE Transactions on Wireless Communications
Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels

IEEE Transactions on Information Theory
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks

IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior

IEEE Transactions on Information Theory
Spectrum sensing in cognitive radio networks: requirements, challenges and design trade-offs

IEEE Communications Magazine

Quantified Score

Hi-index	0.00

Visualization

Abstract

This paper investigates the outage and diversity performance in a cognitive radio (CR) network, in which data are transmitted through amplify-and-forward protocol. A fixed CR node is selected as relay to combat fading effect. The CR user transmits or relays data when the result of cooperative spectrum sensing indicates that primary user (PU) channel is free and the relay node stops performing the protocol as soon as the PU is detected to be active. A closed-form expression of outage probability for the CR network is calculated based on which diversity order is derived. The results show that the proposed scheme suffers a loss in diversity order. To compensate for this loss, a repetition-based scheme is proposed in a delay-insensitive system at the cost of the challenge in implementation. In this case, we evaluate the outage performance and the average transmit duration and then compare them with the ones in the delay-sensitive system. Asymptotic analysis is also presented to show the outage performance advantage of using a relay over the one without using it. The numerical results presented in the paper verify our analysis.