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| Presentation | 2026-09-09 15:50 A Study on Improving Communication Quality in Dead Zones through Sequential Reflections Yasutaka Murakami (UEC), Jerdvisanop Chakarothai, Katsumi Fujii, Shinichi Sato, Masato Nakano (NICT), Koki Takebe, Hirokazu Sugiura, Mitsuyoshi Maekawa (IRII), Masatosi Sano, Tomoaki Shimizu, Hiroshi Ogawa (SEKISUI)  AP2026-82 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | To improve communication quality in wireless coverage holes caused by signal blockage, this study investigates electromagnetic wave propagation control using multi-reflection with multiple reflectors having different reflection characteristics. Since conventional propagation control methods based on a single reflection may face challenges in achieving the desired propagation direction and sufficient received power, a method using multiple reflectors is proposed to efficiently guide electromagnetic waves even in non-line-of-sight (NLOS) environments. It was confirmed that incident waves can be gradually directed toward the desired direction by appropriately arranging reflectors with different reflection phases and scattering characteristics. As a result, the proposed method improves the received signal strength even in environments where direct waves cannot easily reach, demonstrating its effectiveness for enhancing wireless coverage in coverage-hole areas. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Wireless coverage holes / Coverage improvement / Electromagnetic propagation control / Metasurface / Non-line-of-sight (NLOS) communication / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 126, no. 172, AP2026-82, pp. 61-65, Sept. 2026. | |
| Paper # | AP2026-82 | |
| Date of Issue | 2026-09-02 (AP) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | AP2026-82 |
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| Conference Information | |
| Committee | MW AP |
| Conference Date | 2026-09-09 - 2026-09-11 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ishikawa Prefectural Library |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, Millimeter wave, Radio propagation, Antennas and Propagation |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2026-09-MW-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Improving Communication Quality in Dead Zones through Sequential Reflections |
| Sub Title (in English) | |
| Keyword(1) | Wireless coverage holes |
| Keyword(2) | Coverage improvement |
| Keyword(3) | Electromagnetic propagation control |
| Keyword(4) | Metasurface |
| Keyword(5) | Non-line-of-sight (NLOS) communication |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yasutaka Murakami |
| 1st Author's Affiliation | The University of Electro-Communications (UEC) |
| 2nd Author's Name | Jerdvisanop Chakarothai |
| 2nd Author's Affiliation | National Institute of Information and Communications (NICT) |
| 3rd Author's Name | Katsumi Fujii |
| 3rd Author's Affiliation | National Institute of Information and Communications (NICT) |
| 4th Author's Name | Shinichi Sato |
| 4th Author's Affiliation | National Institute of Information and Communications (NICT) |
| 5th Author's Name | Masato Nakano |
| 5th Author's Affiliation | National Institute of Information and Communications (NICT) |
| 6th Author's Name | Koki Takebe |
| 6th Author's Affiliation | Industrial Research Institute of Ishikawa (IRII) |
| 7th Author's Name | Hirokazu Sugiura |
| 7th Author's Affiliation | Industrial Research Institute of Ishikawa (IRII) |
| 8th Author's Name | Mitsuyoshi Maekawa |
| 8th Author's Affiliation | Industrial Research Institute of Ishikawa (IRII) |
| 9th Author's Name | Masatosi Sano |
| 9th Author's Affiliation | SEKISUI CHEMICAL CO., LTD. (SEKISUI) |
| 10th Author's Name | Tomoaki Shimizu |
| 10th Author's Affiliation | SEKISUI CHEMICAL CO., LTD. (SEKISUI) |
| 11th Author's Name | Hiroshi Ogawa |
| 11th Author's Affiliation | SEKISUI CHEMICAL CO., LTD. (SEKISUI) |
| Speaker | Author-1 |
| Date Time | 2026-09-09 15:50:00 |
| Presentation Time | 20 minutes |
| Registration for | AP |
| Paper # | AP2026-82 |
| Volume (vol) | vol.126 |
| Number (no) | no.172 |
| Page | pp.61-65 |
| #Pages | 5 |
| Date of Issue | 2026-09-02 (AP) |
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