| Paper Abstract and Keywords |
| Presentation |
2026-01-23 16:00
Comparative Correlation between Received Power of V-Low Band Radio Wave from Korea to Japan and Tropospheric Radio Ducts around the Transmitting and Receiving Sites Shunpei Yamaguchi, Rikito Tateishi, Makoto Kobayashi, Koichi Shin, Masahiro Nishi (Hiroshima City Univ.) CAS2025-83 ICTSSL2025-61 |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In Japan, the VHF band is gaining attention as a key communication infrastructure for ensuring reliable mass broadcasting during disasters. Within the VHF band, the frequency range from 90 MHz to 108 MHz, known as the V-Low band, is also allocated for FM broadcast waves in South Korea. One factor degrading signal quality in Japan's VHF band is interference from long-distance propagation originating in South Korea, known as duct propagation, which is caused by atmospheric conditions. Numerous studies have been conducted to elucidate the mechanism behind duct propagation, aiming to support various applications including proper broadcasting operations. While research has particularly focused on clarifying the relationship between atmospheric conditions causing atmospheric refraction inversions, known as radio ducts, and radio waves, the relationship between atmospheric conditions observed at both VHF band transmission and reception sites and duct propagation remains unclear. This study evaluated the long-term relationship between radio duct occurrence near and around transmission and reception sites and the received power at the reception site. This revealed the influence of atmospheric conditions at both the transmission and reception sides on duct propagation. Specifically, it was found that, compared with the transmitting side, the occurrence of radio ducts and the increase in received power at the receiving side were correlated, and that radio ducts in the vicinity and in the northeastern area of the receiving site affected the increase in received power. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
V-Low band / anomalous propagation / radio duct / M-profile / / / / |
| Reference Info. |
IEICE Tech. Rep., vol. 125, no. 322, ICTSSL2025-61, pp. 144-149, Jan. 2026. |
| Paper # |
ICTSSL2025-61 |
| Date of Issue |
2026-01-15 (CAS, ICTSSL) |
| 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 |
CAS2025-83 ICTSSL2025-61 |
| Conference Information |
| Committee |
ICTSSL CAS |
| Conference Date |
2026-01-22 - 2026-01-23 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
|
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
ICTSSL |
| Conference Code |
2026-01-ICTSSL-CAS |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Comparative Correlation between Received Power of V-Low Band Radio Wave from Korea to Japan and Tropospheric Radio Ducts around the Transmitting and Receiving Sites |
| Sub Title (in English) |
|
| Keyword(1) |
V-Low band |
| Keyword(2) |
anomalous propagation |
| Keyword(3) |
radio duct |
| Keyword(4) |
M-profile |
| Keyword(5) |
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| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Shunpei Yamaguchi |
| 1st Author's Affiliation |
Hiroshima City University (Hiroshima City Univ.) |
| 2nd Author's Name |
Rikito Tateishi |
| 2nd Author's Affiliation |
Hiroshima City University (Hiroshima City Univ.) |
| 3rd Author's Name |
Makoto Kobayashi |
| 3rd Author's Affiliation |
Hiroshima City University (Hiroshima City Univ.) |
| 4th Author's Name |
Koichi Shin |
| 4th Author's Affiliation |
Hiroshima City University (Hiroshima City Univ.) |
| 5th Author's Name |
Masahiro Nishi |
| 5th Author's Affiliation |
Hiroshima City University (Hiroshima City Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-01-23 16:00:00 |
| Presentation Time |
25 minutes |
| Registration for |
ICTSSL |
| Paper # |
CAS2025-83, ICTSSL2025-61 |
| Volume (vol) |
vol.125 |
| Number (no) |
no.321(CAS), no.322(ICTSSL) |
| Page |
pp.144-149 |
| #Pages |
6 |
| Date of Issue |
2026-01-15 (CAS, ICTSSL) |