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Wireless Powered Cognitive Radio Networks with Compressive Sensing and Matrix Completion

Research output: Contribution to journalArticle

Zhijin Qin, Yuanwei Liu, Yue Gao, Maged Elkashlan, Arumugam Nallanathan

Original languageEnglish
Article number7731231
Pages (from-to)1464-1476
Number of pages13
JournalIEEE Transactions on Communications
Volume65
Issue number4
Early online date2 Nov 2016
DOIs
Publication statusPublished - 1 Apr 2017

Documents

  • Throughput Analysis of Wireless_QIN_AcceptedOctober2016_GREEN AAM

    Zhijin_TCOM.pdf, 378 KB, application/pdf

    2/11/2016

    Accepted author manuscript

    Other

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King's Authors

Abstract

In this paper, we consider cognitive radio networks in which energy constrained secondary users (SUs) can harvest energy from the randomly deployed power beacons. A new frame structure is proposed for the considered networks. In the considered network, a wireless power transfer model is proposed, and the closed-form expressions for the power outage probability are derived. In addition, in order to reduce the energy consumption at SUs, sub-Nyquist sampling are performed at SUs. Subsequently, compressive sensing and matrix completion techniques are invoked to recover the original signals at the fusion center by utilizing the sparsity property of spectral signals. Throughput optimizations of the secondary networks are formulated into two linear constrained problems, which aim to maximize the throughput of a single SU and the whole cooperative network, respectively. Three methods are provided to obtain the maximal throughput of secondary networks by optimizing the time slots allocation and the transmit power. Simulation results show that the maximum throughput can be improved by implementing compressive spectrum sensing in the proposed frame structure design.

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