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Open AccessFeature PaperArticle

Transmission Strategy for Simultaneous Wireless Information and Power Transfer with a Non-Linear Rectifier Model

Department of Electrical Engineering (ESAT), KU Leuven, B-3001 Leuven, Belgium
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Author to whom correspondence should be addressed.
Current address: Huawei Technologies.
Electronics 2020, 9(7), 1082; https://doi.org/10.3390/electronics9071082
Received: 8 June 2020 / Revised: 25 June 2020 / Accepted: 29 June 2020 / Published: 1 July 2020
(This article belongs to the Section Microwave and Wireless Communications)
Most studies determining data rate or power conversion efficiency (PCE) of simultaneous wireless information and power transfer (SWIPT) focus on ideal models for the non-linear energy harvester, or focus on simplified waveforms that carry no information. In this paper, we study SWIPT using realistic waveforms and a measurement-based energy harvesting model. For a special class of multisine waveforms carrying only information in the phase, we analyze PCE as a function of waveform design, including the impact of pre-equalization to mitigate wireless channel distortion. A balanced pre-equalizer that trades off between the peak-to-average power ratio (PAPR) and signal to noise ratio, maximizing the total PCE is proposed. The impact on the information rate of the analyzed waveforms is also presented. The results show that balanced pre-equalizers can improve the total PCE more than three times within 5% rate loss compared to the pre-equalizer that solely maximizes the signal PAPR or the capacity using the same transmit power. We also show that the maximum normalized PCE is increased by a factor of two by only allowing phase modulation to ensure the PAPR of one symbol, compared to traditional modulation schemes that carry information in both phase and amplitude to maximize spectral efficiency. View Full-Text
Keywords: simultaneous wireless information and power transfer; non-linear rectifier; multi-tone signal; transmission strategy simultaneous wireless information and power transfer; non-linear rectifier; multi-tone signal; transmission strategy
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MDPI and ACS Style

Pan, N.; Rajabi, M.; Claessens, S.; Schreurs, D.; Pollin, S. Transmission Strategy for Simultaneous Wireless Information and Power Transfer with a Non-Linear Rectifier Model. Electronics 2020, 9, 1082.

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