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Performance optimization for energy harvesting cognitive cooperative networks with imperfect spectrum sensing

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Abstract

In this paper, considering imperfect spectrum sensing in a cognitive cooperative system, we study the performance optimization for throughput maximization of secondary user (SU) and average delay minimization under maximum delay constraint of primary user (PU) with harvested energy from radio frequency signal of active PU by cooperative SU. We use a one-dimension linear search method to decompose the two optimization problems due to the non-convexity of the original optimization. We prove that the above maximization and minimization have same forms of solution under the same constraints. Simulation results indicate that the throughput performance of SU is higher than that of traditional cognitive system.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant No. 61501202.

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Authors and Affiliations

  1. College of Communication Engineering, Jilin University, Changchun, China

    Yao Wang, Xiaohui Zhao & Hui Liang

Authors
  1. Yao Wang
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  2. Xiaohui Zhao
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  3. Hui Liang
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Correspondence to Hui Liang.

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Wang, Y., Zhao, X. & Liang, H. Performance optimization for energy harvesting cognitive cooperative networks with imperfect spectrum sensing. Wireless Netw 25, 4611–4623 (2019). https://doi.org/10.1007/s11276-018-1754-8

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