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Unary Coding Design for Simultaneous Wireless Information and Power Transfer with Practical M-QAM

Zhao, Y; Hu, J; Yang, K; Wong, KK; (2020) Unary Coding Design for Simultaneous Wireless Information and Power Transfer with Practical M-QAM. IEEE Transactions on Wireless Communications 10.1109/TWC.2020.3044722. (In press). Green open access

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Abstract

Relying on the propagation of modulated radio-frequency (RF) signals, we can achieve simultaneous wireless information and power transfer (SWIPT) to support low-power communication devices. In this paper, we proposed a unary coding based SWIPT encoder by considering a practical M-QAM. Markov chains are exploited for characterising coherent binary information source and for modelling the generation process of modulated symbols. Therefore, both mutual information and the average energy harvesting performance at the SWIPT receiver are analysed in semi-closed-form. With the aid of the genetic algorithm, the sub-optimal codeword distribution of the coded information source is obtained by maximising the average energy harvesting performance, while satisfying the requirement of the mutual information. Simulation results demonstrate the advantage of the SWIPT encoder. Moreover, a higher-level unary code and a lower-order M-QAM results in higher WPT performance, when the maximum transmit power of the modulated symbol is fixed.

Type: Article
Title: Unary Coding Design for Simultaneous Wireless Information and Power Transfer with Practical M-QAM
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2020.3044722
Publisher version: https://doi.org/10.1109/TWC.2020.3044722
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10119449
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