Performance Analysis for Opportunistic Full-Duplex Relay Selection in Underlay Cognitive Networks

The performance analysis of optimal decode-and-forward (DF) relay selection for the full-duplex (FD) mode in underlay cognitive radio (CR) networks is studied, with the impact of critical parameters such as the residual self-interference, the distributions of the received signal-to-noise ratio (SNR)...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2015-10, Vol.64 (10), p.4905-4910
Main Authors: Zhong, Bin, Zhang, Zhongshan, Chai, Xiaomeng, Pan, Zhengang, Long, Keping, Cao, Haiyan
Format: Article
Language:English
Subjects:
Channels
Cognitive radio
Cooperative networks
decode-and-forward
Educational institutions
full-duplex
Interference
Materials requirements planning
Mathematical models
Networks
Noise levels
Optimization
outage probability
Outages
Rayleigh channels
Relay
relay selection
Relays
Signal to noise ratio
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Summary:The performance analysis of optimal decode-and-forward (DF) relay selection for the full-duplex (FD) mode in underlay cognitive radio (CR) networks is studied, with the impact of critical parameters such as the residual self-interference, the distributions of the received signal-to-noise ratio (SNR), and the outage probability, being analyzed. Different from the conventional relay selection schemes with half-duplex (HD) mode, the FD relay suffers from the impact of residual self-interference due to its simultaneous transmission and reception using the same channel. Furthermore, the exact closed-form expressions for the outage probabilities of the proposed FD relay-selection scheme over both independent Nakagami- m and Rayleigh fading channels are derived, with the validity of the proposed analysis being proven by using simulation. Numerical results show that, in the presence of multiple candidate relays, an optimum relay-selection solution in terms of outage probability can always be achievable within the SNR range of (10 dB, 15 dB).
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2014.2368584