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

Zhao, Yizhe and Hu, Jie and Yang, Kun and Wong, Kai-Kit (2021) 'Unary Coding Design for Simultaneous Wireless Information and Power Transfer With Practical M-QAM.' IEEE Transactions on Wireless Communications, 20 (5). pp. 2850-2862. ISSN 1536-1276

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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.

Item Type: Article
Uncontrolled Keywords: Simultaneous wireless information and power transfer (SWIPT); unary coding; modulation; Markov chain; genetic algorithm
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 28 Jan 2022 11:30
Last Modified: 23 Sep 2022 19:44
URI: http://repository.essex.ac.uk/id/eprint/32149

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