Asymmetric Modulation Design for Wireless Information and Power Transfer With Nonlinear Energy Harvesting
Asymmetric Modulation Design for Wireless Information and Power Transfer With Nonlinear Energy Harvesting
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DOI：
10.1109/twc.2019.2937024
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发表时间：
2018-02
影响因子：
10.4
通讯作者：
Ekaterina Bayguzina;B. Clerckx
中科院分区：
文献类型：
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作者：
Ekaterina Bayguzina;B. Clerckx
远场无线功率传输（WPT）和同时无线信息和功率传输（SWIPT）近来在射频（RF）和通信社区中变得越来越重要。然而，SWIPT的调制设计问题几乎没有得到解决。本文考虑了一种基于非对称相移键控（PSK）的调制方案，该方案显著改善了SWIPT的速率-能量折衷区。非线性整流器模型，它准确地模拟能量采集器，被用来评估在接收器的输出直流（DC）功率。在发射机处的平均功率约束和对在平坦衰落信道上经由多载波信号传输的信息的速率的约束下，使所收获的DC功率最大化。由于整流器的非线性，这项工作强调，非对称PSK调制提供的好处，在传统的对称PSK调制SWIPT和打开大门，为SWIPT定制的系统调制设计。
Far-field wireless power transfer (WPT) and simultaneous wireless information and power transfer (SWIPT) have become increasingly important in radio frequency (RF) and communication communities recently. The problem of modulation design for SWIPT has however been scarcely addressed. In this paper, a modulation scheme based on asymmetric phase-shift keying (PSK) is considered, which improves the SWIPT rate-energy trade-off region significantly. The nonlinear rectifier model, which accurately models the energy harvester, is adopted for evaluating the output direct current (DC) power at the receiver. The harvested DC power is maximized under an average power constraint at the transmitter and a constraint on the rate of information transmitted via a multi-carrier signal over a flat fading channel. As a consequence of the rectifier nonlinearity, this work highlights that asymmetric PSK modulation provides benefits over conventional symmetric PSK modulation in SWIPT and opens the door to systematic modulation design tailored for SWIPT.