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Wireless Personal Communications

, Volume 97, Issue 4, pp 6325–6342 | Cite as

Energy Harvesting Based Multihop Relaying in Cognitive Radio Network

Article
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Abstract

In this paper, a multihop cognitive radio network using a series of multiple decode and forward (DF) energy harvesting relays is proposed to enhance the spectrum utilization and lifetime of the network. A time switching based energy harvesting scheme is considered for the DF relays. An analytical expression has been derived for evaluating the transmission power of the secondary source and secondary relays (SR) as well as SNR at SRs and secondary destination. The corresponding transmission power and signal to noise ratio (SNR) profiles are also analyzed for several numbers of relays under various locations of the primary transmitter (PT). An expression for a critical number of relays, for which the performance of the network is worst, has also been derived. It is seen that upto a critical number of relays the SNR decreases. However the SNR again increases with further increase in number of relays. Further secondary outage probabilities have been compared for several locations of PT. Analytical results following our development are presented and validated by MATLAB based simulation.

Keywords

Energy harvesting Multihop Decode forward relay Time splitting relaying protocol Rayleigh fading channel Underlay 

Notes

Acknowledgements

This research is supported by the Department of Electronics and Information Technology, Ministry of Communications and IT, Government of India under the Visvesvaraya PhD Scheme administered by Media Lab Asia with grant number PhD-MLA/4(29)/2015-16.

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.ECE DepartmentNITDurgapurIndia

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