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GNU RadioͰԻ੠ͷ ϦΞϧλΠϜม׵͍͚ͨ͠Ͳ ·ͩ͏·͍ͬͯ͘ͳ͍ த઒ˏtakuzirra 2018/04/14(Sat.) Open Source UN-Conference 2018 Kawagoe

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͓લ୭Αʁ • @takuzirra • https://twitter.com/takuzirra • ૊ΈࠐΈΤϯδχΞͷͭ΋Γ͕ͩͬͨɺ • ࠷ۙ͸૷ஔͷςετΛͨ͠Γɺ • VBAΛॻ͍ͨΓɺKiCADͰج൘࡞੒ͨ͠Γɺ • DjangoΛษڧͨ͠ΓɺGNU RadioͰ༡ΜͩΓ͍ͯ͠Δ ͸͍;Γܶ৔൛΍ͬͨʔʂ དྷिͷٕज़ॻయ͸͜Ε͔Β

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ಈػᶃ • Ի੠ͷϦΞϧλΠϜ߹੒ͷ੡඼ͷهࣄΛΈͨͷͱ • Ի੠߹੒γεςϜWORLDͰԻ੠Λม׵ͯ͠Έͨͱ͍͏࿩Λฉ͍ͯɺ GNU Radioͱ߹ΘͤΕ͹ϦΞϧλΠϜม׵Ͱ͖ΔΜ͡Όͳ͍͔ͱࢥ͍ɺ ΍ͬͯΈͨͱ͜Ζ https://news.mynavi.jp/article/20180208-582470/ https://qiita.com/ohtaman/items/84426cee09c2ba4abc22

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LTͷωλ͕ࢥ͍͔ͭͳ ͔ͬͨͷͰɺԻ੠ͷϦ ΞϧλΠϜม׵Λࢼ͠ ͸͡Ίͨ ಈػᶄ ϑΟϧλΛ͔͚Δ͙Β͍ͳΒ؆୯ʹͰ͖ΔͷͰ͸ͳ͍͔ͱࢥ͍

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GNU Radioʹ͍ͭͯ • ιϑτ΢ΣΞແઢͷΦʔϓϯιʔειϑτ΢ΣΞ • ϚΠΫͰԻ੠͔ΒRFϑϩϯτΤϯυͰߴप೾ʢʙ6GHzʣ ·Ͱ৴߸Λऔಘͯ͠ɺFFTͨ͠ΓɺσίʔυͰ͖ͨΓ͢Δ • FM/AMϥδΦ͔ΒWiFi, Bluetooth, Zigbee, LoRa, GNSS ͳͲͳͲ……

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Πϯετʔϧ • $ sudo apt-get install gnuradio //on Ubuntu • $ sudo apt-get install gr-osmosdr //֤RFϑϩϯτΤϯυ ରԠͨ͠ϒϩοΫΛ௥Ճ͢ΔͨΊ • ιʔε͔ΒΠϯετʔϧ͢Δ৔߹͸ɺsbracͰ഑෍͞Εͯ ͍ΔϓϩάϥϜΛ࢖͏ͱศར

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αϯϓϦϯάͯ͠ग़ྗ • ΋͔ͨ͠͠Β΋͔ͨ͠͠Β͜ΕͰ͢΂ͯ͏·͍ͬͯ͘͠· ͏ͷͰ͸ͳ͍͔ͱࢥ͕ͬͨɺͦΜͳ͜ͱ͸ͳ͔ͬͨɻΑ ͘Θ͔Βͳ͍ϊΠζ͕ͷ͍ͬͯΔ

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FFTͯ͠ΈΔ • ೾ܗ͕੠ʹ൓Ԡ͍ͯ͠ΔͷͰɺϚΠΫ͸ೝࣝͯͦ͠͏ͩ

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FFTͨ͠೾ܗ

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ϩʔύεϑΟϧλ͕ඞཁʁ • ੠ͷप೾਺ʹ߹ΘͤΔ ɻ 500Hz͙Β͍ʁͲΕ͙Β͍ͷप ೾਺ʹ߹ΘͤΔ͔ߟ͑Δඞཁ͕͋Δ

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ϩʔύεϑΟϧλͨ͠೾ܗ • 4kHzͰϑΟϧλͯ͠ΈͨɻϑΟϧλ͸Ͱ͖ͯͦ͏ͩɻ͔͠͠Ի੠͸ಉ͡ɻ੠͸΋ͬͱԼͷप೾਺ʁ

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ϑΝΠϧอଘ • ετϦʔϛϯά͸ෆ۩߹ղੳ͠ʹ͍͘ͷͰɺϑΝΠϧอଘ ʹཱͪฦΔ

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ϑΝΠϧ࠶ੜ • ϑΝΠϧ͔ΒͷಡΈग़͠ɺ৴߸଎౓ͷఆٛͱͯ͠ɺ Throttle͕͍ΔͬΆ͍

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ࠓޙͷల๬ʢ࣍ճ༧ࠂʢԾʣ ʣ • ϩʔύεϑΟϧλ͸Ͱ͖ͨˡਓͷ੠ͷҧ͍ͬͯ୯७ͳϑΟ ϧλͰ͸ͳͦ͞͏͚ͩͲɺͲ͏ҧ͏ͷʁˡௐ΂Δ • ϑΝΠϧอଘʗ࠶ੜ͸֬ೝͰ͖ͨ • ੠Λߴͨ͘͠Γɺ௿ͨ͘͠Γ͍ͨ͠ • python blockʹ੠ͷม׵ϥΠϒϥϦΛຒΊࠐΈ͍ͨ • ະདྷ͸Ͳͬͪͩʗ࣍ճ࡞ʹ͝ظ଴͍ͩ͘͞