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Article: Space-Time Signal Optimization for SWIPT: Linear versus Nonlinear Energy Harvesting Model
Title | Space-Time Signal Optimization for SWIPT: Linear versus Nonlinear Energy Harvesting Model |
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Authors | |
Keywords | Internet of Things Nonlinear energy harvesting model Signal optimization SWIPT |
Issue Date | 2018 |
Publisher | Institute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4234 |
Citation | IEEE Communications Letters, 2018, v. 22 n. 2, p. 408-411 How to Cite? |
Abstract | In simultaneous wireless information and power transfer systems, optimization of transmit signals is critical to system performance. Although the optimization problem can be efficiently solved under a linear energy harvesting model, the obtained solution may not work well in practice, since the energy harvester contains nonlinear elements, such as diodes. On the other hand, while a nonlinear model can be used to capture the dynamics of energy harvesting circuits, it introduces additional complexity at the optimization stage. Specifically, under a nonlinear model, traditional convex optimization is not applicable, since the energy harvesting function is fractional. To address this challenge, this letter first derives an optimal solution for static channels by introducing pseudo-inverse of the nonlinear model. Then, an iterative algorithm that converges to a sub-optimal solution is proposed for time varying channels. With the developed methods, the performance-complexity tradeoff between linear and nonlinear models is illustrated. |
Persistent Identifier | http://hdl.handle.net/10722/259295 |
ISSN | 2023 Impact Factor: 3.7 2023 SCImago Journal Rankings: 1.887 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wang, S | - |
dc.contributor.author | Xia, M | - |
dc.contributor.author | Wu, YC | - |
dc.date.accessioned | 2018-09-03T04:04:41Z | - |
dc.date.available | 2018-09-03T04:04:41Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | IEEE Communications Letters, 2018, v. 22 n. 2, p. 408-411 | - |
dc.identifier.issn | 1089-7798 | - |
dc.identifier.uri | http://hdl.handle.net/10722/259295 | - |
dc.description.abstract | In simultaneous wireless information and power transfer systems, optimization of transmit signals is critical to system performance. Although the optimization problem can be efficiently solved under a linear energy harvesting model, the obtained solution may not work well in practice, since the energy harvester contains nonlinear elements, such as diodes. On the other hand, while a nonlinear model can be used to capture the dynamics of energy harvesting circuits, it introduces additional complexity at the optimization stage. Specifically, under a nonlinear model, traditional convex optimization is not applicable, since the energy harvesting function is fractional. To address this challenge, this letter first derives an optimal solution for static channels by introducing pseudo-inverse of the nonlinear model. Then, an iterative algorithm that converges to a sub-optimal solution is proposed for time varying channels. With the developed methods, the performance-complexity tradeoff between linear and nonlinear models is illustrated. | - |
dc.language | eng | - |
dc.publisher | Institute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4234 | - |
dc.relation.ispartof | IEEE Communications Letters | - |
dc.rights | © 2017 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. | - |
dc.subject | Internet of Things | - |
dc.subject | Nonlinear energy harvesting model | - |
dc.subject | Signal optimization | - |
dc.subject | SWIPT | - |
dc.title | Space-Time Signal Optimization for SWIPT: Linear versus Nonlinear Energy Harvesting Model | - |
dc.type | Article | - |
dc.identifier.email | Wu, YC: ycwu@eee.hku.hk | - |
dc.identifier.authority | Wu, YC=rp00195 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1109/LCOMM.2017.2770142 | - |
dc.identifier.scopus | eid_2-s2.0-85034269387 | - |
dc.identifier.hkuros | 289192 | - |
dc.identifier.volume | 22 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 408 | - |
dc.identifier.epage | 411 | - |
dc.identifier.isi | WOS:000425103800048 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1089-7798 | - |