Computer Science ›› 2017, Vol. 44 ›› Issue (6): 108-113.doi: 10.11896/j.issn.1002-137X.2017.06.019

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Subcarrier Pairing Strategy for Energy Efficiency Optimization in Cognitive Radio

ZHAO Cheng, HAO Yin-yin, HUA Jing-yu, YAO Xin-wei and WANG Wan-liang   

  • Online:2018-11-13 Published:2018-11-13

Abstract: To improve the energy efficiency in cooperative cognitive radio system,a joint resource allocation algorithm was proposed.Firstly,a heuristic scheme with energy efficiency in priority is considered for subcarrier pairing,QoS and power constraint are satisfied.Then,the power allocation is optimized with the Lagrangian dual algorithm to maximize the system energy efficiency.Simulation results demonstrate a significant enhancement in the energy efficiency and the validity of the proposed algorithm.

Key words: Cognitive radio,Subcarrier pairing,Power allocation,Energy efficiency

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