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インターネットとオープンな無線技術の今後 / Future of Internet and O...

Kenji Rikitake
September 03, 2020

インターネットとオープンな無線技術の今後 / Future of Internet and Open Radio Engineering

情報処理学会第51回IOT研究会 2020年9月3日

Kenji Rikitake

September 03, 2020
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  1. ి೾๏ʹ͓͚Δྫ֎ͷ਺ʑ • ແઢLANʢIEEE802.11ʣ • ܞଳి࿩΍εϚʔτϑΥϯͷ୺຤: ిؾ௨৴ࣄۀऀ͕໔ڐΛ୅ߦ • LoRaWAN: 920MHzଳͷಛఆখిྗແઢ •

    σδλϧ؆қແઢ / σδλϧখిྗίϛϡχςΟແઢ • ΞϚνϡΞແઢʢϏδωεͷ࿩ʹ͸࢖͑ͳ͍ʣ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 7
  2. RTL-SDR V3 • ςϨϏड৴νοϓͷԠ༻ • 24MHz ~ 1766MHz • FM์ૹɺߤۭແઢɺΞϚνϡΞແઢɺ

    ADS-B౳ͷड৴ʹ޿͘࢖ΘΕ͍ͯΔ • FlightRadar24ͷਪ঑ػࡐ • υϥΠό͸OSS • ֤छOSSΞϓϦʹରԠ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 10
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  5. SDRʹΑΔFMϚϧνύε ϑΟϧλͷ࣮૷ྫ • ൃදऀͷOSS airspy-fmradionʹ࣮ͯ૷ • దԠϑΟϧλʹConstant Modulus AlgorithmͱෳૉLMSϑΟϧλΛ࢖༻ •

    ӈਤ͸NHKେࡕFM์ૹͷ࣌ใԻͷεϖ Ϋτϧ෼෍ɺTHD+NΛ0.918%ʢ྘ʣ͔ Β0.242%ʢ੺ʣʹ௿ݮ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 13
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  9. ຊൃදͷؔ࿈ݚڀใࠂ/࿦จ • ༧ߘ: ྗ෢݈࣍: ΠϯλʔωοτͱΦʔϓϯͳແઢٕज़ͷࠓޙ, Vol. 2020-IOT-51, No. 1, IPSJ,

    pp. 1--8 (2020). ISSN 2188-8787. ༧ߘͷPDFϑΝΠϧʢஶऀWebαΠτʣ 1 • Frissell, N. A., Miller, E. S., Kaeppler, S. R., Ceglia, F., Pascoe, D., Sinanis, N., Smith, P., Williams, R., and Shovkoplyas, A. (2014), Ionospheric Sounding Using Real‐Time Amateur Radio Reporting Networks, Space Weather, 12, 651– 656, doi: 10.1002/2014SW001132. 1 ͜͜ʹܝࡌͨ͠ஶ࡞෺ͷར༻ʹؔ͢Δ஫ҙ: ຊൃදͷ༧ߘͷஶ࡞ݖ͸৘ใॲཧֶձʹؼଐ͠·͢ɻຊஶ࡞෺͸ஶ࡞ ݖऀͰ͋Δ৘ใॲཧֶձͷڐՄͷ΋ͱʹஶऀͷWebαΠτʹܝࡌ͢Δ΋ͷͰ͢ɻ͝ར༻ʹ౰ͨͬͯ͸ʮஶ࡞ݖ๏ʯ ͳΒͼʹʮ৘ใॲཧֶձྙཧߝྖʯʹै͏͜ͱΛ͓ئ͍͍ͨ͠·͢ɻ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 27