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Wireless Personal Communications

, Volume 96, Issue 1, pp 1–21 | Cite as

Cooperative Hybrid Spectrum Sharing: A NOMA-based Approach

  • Md Fazlul KaderEmail author
  • Soo Young Shin
Article

Abstract

Non-orthogonal multiple (NOMA) access using successive interference cancellation and cognitive radio are two promising techniques for enhancing the spectrum efficiency and utilization for future wireless communication systems. This paper presents a NOMA-based cooperative hybrid spectrum sharing protocol for cognitive radio networks. A two phase decode-and- forward (DF) relaying scheme in a multi-relay scenario is considered. Each secondary transmitter is grouped into one of the two clusters: a non-cooperative cluster (NCC) and a cooperative cluster (CC). The cluster head (CH) of the CC working as the best DF relay for the primary system is permitted to transmit its own signal superimposed on the primary signal using a NOMA approach in exchange for cooperation. On the other hand, the CH of the NCC transmits in parallel with the primary system satisfying a predefined peak transmit power and peak interference power constraints that guarantee a given primary quality of the service requirement. It is demonstrated that the performances of both the primary and secondary systems increase with the increasing number of secondary nodes. The simulation and theoretical results affirm the efficacy of the proposed protocol compared to the traditional overlay and underlay models in terms of the outage probability and the ergodic capacity.

Keywords

Non-orthogonal multiple access Successive interference cancellation Cognitive radio Spectrum sharing Cluster head Outage probability Ergodic capacity 

Notes

Acknowledgements

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015R1D1A1A01061075).

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.WENS Laboratory, Department of IT Convergence EngineeringKumoh National Institute of TechnologyGumiRepublic of Korea

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