| Presentation | 2016-07-21 Measurements on Overreach Propagation from Korea in V-Low Band Masahiro Nishi, Shotaro Taniyama, Koichi Shin, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, in Japan, the digitalization of the terrestrial TV broadcasting systems have been finished, and supplementary FM broadcastings for AM ones and multimedia broadcastings have been introduced for efficiently utilizing the V-Low (VHF Low) band, that was a frequency band formerly assigned for analog TV broadcasting waves from Ch.1 to Ch.3. The V-Low band is now utilized by analog FM broadcasting systems in Korea. Especially in Chugoku and Kyushu regions, the V-Low band radio systems have possibilities of co-channel interferences caused by overreach propagations of FM waves from Korea. In this study, to evaluate characteristics of the overreach propagations, which are necessary to estimate the interferences in V-Low band, we have measured FM waves from Korea in Kyushu region for two years or more. This report shows the measurement results obtained in Kyushu University and Kyushu Institute Technology from Sep. 2013 to Sep. 2015. The measurement targets were FM waves from Busan, Changwon and Ulsan station in Korea. From the measurement results, it was found that the overreach propagations frequently occurred from March to October and the RSSI (Received Signal Strength Indicator) were increased 20dB or 30dB more than usual. And it was also confirm that the overreach propagations from Changwon station were affected by the mountain diffractions of Tsushima. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | V-Low band / Overreach Propagation / FM Broadcasting / Atmospheric Duct / RSSI |
| Paper # | AP2016-44 |
| Date of Issue | 2016-07-13 (AP) |
| Conference Information | |
| Committee | AP / SAT / SANE |
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| Conference Date | 2016/7/20(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Otaru port marina |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Remote sensing, Radio propagation, Antennas and Propagation, Sattelite Communication |
| Chair | Keizo Cho(Chiba Inst. of Tech.) / Takatoshi Sugiyama(Kogakuin Univ.) / Hirokazu Kobayashi(Osaka Inst. of Tech.) |
| Vice Chair | Hisato Iwai(Doshisha Univ.) / Toshinori Susuki(Tohoku Gakuin Univ.) / Hiroyuki Tsuji(NICT) / Takahide Mizuno(JAXA) / Toshifumi Moriyama(Nagasaki Univ.) |
| Secretary | Hisato Iwai(Niigata Univ.) / Toshinori Susuki(NTT DoCoMo) / Hiroyuki Tsuji(NTT) / Takahide Mizuno(KDDI R&D Labs.) / Toshifumi Moriyama(JAXA) |
| Assistant | Nobuyasu Takemura(Nippon Inst. of Tech.) / / Atsushi Kezuka(ENRI) / Manabu Akita(Univ. of Electro-Comm.) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / Technical Committee on Satellite Telecommunications / Technical Committee on Space, Aeronautical and Navigational Electronics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Measurements on Overreach Propagation from Korea in V-Low Band |
| Sub Title (in English) | |
| Keyword(1) | V-Low band |
| Keyword(2) | Overreach Propagation |
| Keyword(3) | FM Broadcasting |
| Keyword(4) | Atmospheric Duct |
| Keyword(5) | RSSI |
| 1st Author's Name | Masahiro Nishi |
| 1st Author's Affiliation | Hiroshima City University(Hiroshima City Univ.) |
| 2nd Author's Name | Shotaro Taniyama |
| 2nd Author's Affiliation | Hiroshima City University(Hiroshima City Univ.) |
| 3rd Author's Name | Koichi Shin |
| 3rd Author's Affiliation | Hiroshima City University(Hiroshima City Univ.) |
| Date | 2016-07-21 |
| Paper # | AP2016-44 |
| Volume (vol) | vol.116 |
| Number (no) | AP-142 |
| Page | pp.pp.43-48(AP), |
| #Pages | 6 |
| Date of Issue | 2016-07-13 (AP) |