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Abstract
Radio frequency (RF) wireless power transfer (WPT) is a promising technology for 6G use cases. It enables a massive yet sustainable deployment of batteryless energy neutral (EN) devices at an unprecedented scale. Recent research on 6G is exploring high operating frequencies up to the THz spectrum, where antenna arrays with large apertures are capable of forming narrow, 'laser-like' beams. At sub-10 GHz frequencies, physically large antenna arrays are considered that are operating in the array near field. Transmitting spherical wavefronts, power can be focused to a focal point rather than a beam, which allows for efficient and radiation-safe WPT. We formulate a multipath channel model comprising specular components and diffuse scattering to find the WPT power budget in a realistic indoor scenario. Specular components can be predicted by means of a geometric model. This is used to transmit power via multiple beams simultaneously, increasing the available power budget and expanding the initial access distance. We show that exploiting this 'beam diversity' reduces the required fading margin for the initial access to EN devices.
Original language | English |
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Title of host publication | 2022 IEEE International Conference on Communications Workshops (ICC Workshops) |
Pages | 127-132 |
Number of pages | 6 |
ISBN (Electronic) | 9781665426718 |
DOIs | |
Publication status | Published - May 2022 |
Event | 2022 IEEE International Conference on Communications: IEEE ICC 2022 - Coex - 513 Yeongdong-daero, Gangnam-gu, Seoul, South Korea, Seoul, Korea, Republic of Duration: 16 May 2022 → 20 May 2022 https://icc2022.ieee-icc.org/ |
Conference
Conference | 2022 IEEE International Conference on Communications |
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Abbreviated title | IEEE ICC 2022 |
Country/Territory | Korea, Republic of |
City | Seoul |
Period | 16/05/22 → 20/05/22 |
Internet address |
Keywords
- 6G
- array near field
- wireless power transfer
- initial access
- beam diversity
- large intelligent surfaces
- distributed MIMO
- distributed massive MIMO
ASJC Scopus subject areas
- Artificial Intelligence
- Control and Optimization
- Signal Processing
- Computer Networks and Communications
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Dive into the research topics of 'Location-based Initial Access for Wireless Power Transfer with Physically Large Arrays'. Together they form a unique fingerprint.Projects
- 1 Active
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EU - REINDEER - REsilient INteractive applications through hyper Diversity in Energy Efficient RadioWeaves technology
Witrisal, K., Deutschmann, B., Wilding, T. & Leitinger, E.
1/01/21 → 30/06/24
Project: Research project