TY - GEN
T1 - Modulation Design for Wireless Information and Power Transfer with Nonlinear Energy Harvester Modeling
AU - Bayguzina, Ekaterina
AU - Clerckx, Bruno
N1 - 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.
PY - 2018/8/24
Y1 - 2018/8/24
N2 - 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.
AB - 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.
KW - Wireless information and power transfer
KW - energy harvesting
KW - modulation
KW - nonlinearity
KW - rectenna
UR - http://www.scopus.com/inward/record.url?scp=85051262577&partnerID=8YFLogxK
U2 - 10.1109/SPAWC.2018.8445891
DO - 10.1109/SPAWC.2018.8445891
M3 - Conference contribution
AN - SCOPUS:85051262577
SN - 9781538635124
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
BT - 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
Y2 - 25 June 2018 through 28 June 2018
ER -