Analysis of energy harvesting cognitive relay network with cooperative spectrum sensing
Abstract
In this study, the authors investigate the performance of an energy harvesting cognitive cooperative multiple relays network with spectrum sensing, where secondary user accesses the licensed spectrum according to the spectrum sensing results. Particularly, if the spectrum hole is detected, the secondary nodes harvest energy from the ambient environment, otherwise, the secondary source and relays transmit with the energy collected from the primary signals. Taking the imperfect spectrum sensing results into account, exact closed‐form expressions for the total outage probability and capacity of the secondary network are derived under the context of Rayleigh fading channels, where the proposed modified selective cooperative decode‐and‐forward relaying transmission schemes are adopted. Compared with the conventional cognitive relay network, the authors must undertake the correlations among the received signal‐to‐noise ratios or signal‐to‐interference‐plus‐noise ratios caused by both the presence of primary user's interference and energy harvesting for the system understudy. It is shown that spectrum sensing phase and data transmission phase are mutual influence and mutual restraint.
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© 2021 The Institution of Engineering and Technology.
Publisher
John Wiley & Sons, Inc.
United States
Publication History
Published: 01 February 2020
Author Tags
Author Tags
- energy harvesting cognitive relay network
- energy harvesting cognitive cooperative multiple relays network
- secondary user
- licensed spectrum
- spectrum hole
- secondary nodes
- secondary source
- relays transmit
- primary signals
- imperfect spectrum sensing results
- total outage probability
- secondary network
- conventional cognitive relay network
- signal‐to‐noise ratios
- signal‐to‐interference‐plus‐noise ratios
- primary user
- spectrum sensing phase
- data transmission phase
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