Abstract
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 tradeoff 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.
Original language | English |
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Title of host publication | 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Print) | 9781538635124 |
DOIs | |
Publication status | Published - 2018 Aug 24 |
Externally published | Yes |
Event | 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 - Kalamata, Greece Duration: 2018 Jun 25 → 2018 Jun 28 |
Publication series
Name | IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC |
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Volume | 2018-June |
Other
Other | 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 |
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Country/Territory | Greece |
City | Kalamata |
Period | 18/6/25 → 18/6/28 |
Bibliographical note
Funding Information:This work was supported in part by the EPSRC of U.K. under Grants EP/K502856/1, EP/L504786/1 and EP/P003885/1.
Publisher Copyright:
© 2018 IEEE.
Keywords
- Wireless information and power transfer
- energy harvesting
- modulation
- nonlinearity
- rectenna
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Information Systems