Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
SDR時代のFM受信 マルチパスモニタとマルチパスフィルタ / FM broadcast re...
Search
Kenji Rikitake
October 05, 2019
Technology
0
650
SDR時代のFM受信 マルチパスモニタとマルチパスフィルタ / FM broadcast reception with SDR - multipath monitor and multipath filter
BCLの集い「秋葉原ミーティング」2019年10月5日 発表原稿
Kenji Rikitake
October 05, 2019
Tweet
Share
More Decks by Kenji Rikitake
See All by Kenji Rikitake
SDR Implementation of Analog FM Broadcast Multipath Filter
jj1bdx
0
850
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
jj1bdx
0
1.2k
FM放送とマルチパスを適応フィルタで極めてみた / Solving multipath distortion of FM broadcast by adaptive filters
jj1bdx
1
3.6k
ソフトウェアラジオとC++ そしてFMエアチェックのための信号解析と数値計算にまつわるよもやま話 / Software radio and C++
jj1bdx
0
1.1k
How I discover a working implementation of clock_nanosleep() for macOS in CPAN Time::Hires
jj1bdx
1
1.3k
Sleeping pays / 1000eng-74th-jj1bdx
jj1bdx
1
49
The BEAM Programming Paradigm
jj1bdx
1
970
Safe randomness: theory and practice
jj1bdx
1
1.5k
ただの失業したインターネット屋は果たして独立開業できたのか? / Did the fired internet engineer finally start up his business successfully as an independent consultant?
jj1bdx
1
460
Other Decks in Technology
See All in Technology
OpenAI gpt-oss ファインチューニング入門
kmotohas
0
300
PythonとLLMで挑む、 4コマ漫画の構造化データ化
esuji5
0
120
新卒QAエンジニアの成長戦略
qatonchan
0
300
stupid jj tricks
indirect
0
7.5k
非エンジニアのあなたもできる&もうやってる!コンテキストエンジニアリング
findy_eventslides
3
840
AI×Data×SaaS×Operation
sansantech
PRO
0
110
Geospatialの世界最前線を探る [2025年版]
dayjournal
2
430
FastAPIの魔法をgRPC/Connect RPCへ
monotaro
PRO
0
470
What is BigQuery?
aizack_harks
0
120
そのグラフに「魂」は宿っているか? ~生成AI全盛期におけるデータ可視化手法とライブラリ比較~
negi111111
2
830
5年間のFintech × Rails実践に学ぶ - 基本に忠実な運用で築く高信頼性システム / 5 Years Fintech Rails Retrospective
ohbarye
9
3.4k
Sidekiq その前に:Webアプリケーションにおける非同期ジョブ設計原則
morihirok
17
6.2k
Featured
See All Featured
Testing 201, or: Great Expectations
jmmastey
45
7.7k
Documentation Writing (for coders)
carmenintech
75
5k
Music & Morning Musume
bryan
46
6.8k
Building Flexible Design Systems
yeseniaperezcruz
329
39k
The Invisible Side of Design
smashingmag
301
51k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.1k
Being A Developer After 40
akosma
90
590k
Designing for Performance
lara
610
69k
Done Done
chrislema
185
16k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.5k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
234
17k
Git: the NoSQL Database
bkeepers
PRO
431
66k
Transcript
SDR࣌ͷFMड৴ ϚϧνύεϞχλͱ ϚϧνύεϑΟϧλ Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019
1
Kenji Rikitake Γ͖͚ͨ ͚Μ͡ ྗ ݈࣍ 5-OCT-2019 BCL Akihabara Mee6ng
Akihabara T-Space Taito, Tokyo, Japan @jj1bdx Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019 2
ٕज़࢜ʢใֶ෦ʣ ྗ݈ٕ࣍ज़࢜ࣄॴ ॴ ϖύϘݚڀॴ ٬һݚڀһ BCLྺ 46 ࠷ۙSDRͷݚڀ։ൃத ͖ͤ·͞ΜͷإΛݟʹདྷ·ͨ͠ Kenji
Rikitake / BCL Akihabara Mee4ng 5-OCT-2019 3
ࠓͷ FMͷ࣭Լ͛ΔϚϧνύε ަมௐ → ϚϧνύεϞχλ దԠϑΟϧλ → ϚϧνύεϑΟϧλ Kenji Rikitake
/ BCL Akihabara Mee4ng 5-OCT-2019 4
FMͱϚϧνύε ෳܦ࿏Λ௨Δిͷׯব ׯবੑϑΣʔδϯάͰৼ෯͕มԽ ৼ෯ͷมԽଈࠁҐ૬ͷΈ Ґ૬͕ΉͱͱͯෆշͳԻ͕͢Δ Kenji Rikitake / BCL Akihabara
Mee4ng 5-OCT-2019 5
ϚϧνύεϞχλ ͳΜͱ͔Ϛϧνύεͷ߹͍ΛϞχλʔ͍ͨ͠ ײతʹଌఆͰ͖ͳ͔ͬͨ Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019
6
FMͷεςϨΦࠩ৴߸ ԻଳҬͷDSB 38kHzͰมௐ 19kHzͷύΠϩοτ৴߸ʹಉظ Kenji Rikitake / BCL Akihabara Mee4ng
5-OCT-2019 7
AMͷަมௐ AM2ͭͷใΛӡΔ sinͲΜͳʹ͕ΜͬͯcosʹͳΒͳ͍ cosͲΜͳʹ͕ΜͬͯsinʹͳΒͳ͍ ͳΒcosͱsinͰ2ͭใ͕ӡͦ͏ Kenji Rikitake / BCL Akihabara
Mee4ng 5-OCT-2019 8
ަมௐϚϧνύεϞχλ(QMM) Brian Beezley, K6STIʹΑΓߟҊ sinͰมௐͨ͠৴߸cosͰݕग़Ͱ͖ͳ͍ɺͣ ͔࣮͠͠ࡍʹΈ͕ൃੜͯ͠৴߸͕ग़ͯ͘Δ ͩͬͨΒͦͷΈΛcosͰݕग़ͯ͠Ϟχλͯ͠ΈΑ͏ Kenji Rikitake /
BCL Akihabara Mee4ng 5-OCT-2019 9
QMMͷར ΄ͱΜͲͷ์ૹʹద༻Մ ԻͰग़ͯ͘ΔͷͰΘ͔Γ͍͢ Իͷେ͖͞ͰϚϧνύεͷࠅ͕͞Θ͔Δ Kenji Rikitake / BCL Akihabara Mee4ng
5-OCT-2019 10
࣍ͷ FMͷϚϧνύεϑΟϧλ Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019 11
ϚϧνύεϑΟϧλ ϚϧνύεͰΜͩ৴߸Λݩʹ͢ Ͳ͏ͬͯ? Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019
12
FMͷϚϧνύεΈ FMૹ৴࣌ৼ෯Ұఆ ෳͷ࣌ؒࠩͰ౸ணͨ͠৴߸͕ׯব ϚϧνύεΈৼ෯ʹݱΕΔ Kenji Rikitake / BCL Akihabara Mee4ng
5-OCT-2019 13
͍͚ͬͯͳ͍͜ͱ ৼ෯Ұఆʹڧ੍ͯ͠Έফ͑· ͤΜ! ϦϛολແҙຯͰ͢ Kenji Rikitake / BCL Akihabara Mee4ng
5-OCT-2019 14
ݪཧʹ࣮ʹߟ͑Δ ෳͷԆ৴߸͕ׯব͍ͯ͠ΔͷͰ͋Εɺ ͦͷׯবͷٯԋࢉΛߦͬͯऔΓআ͍ͯΕ Α͍ Kenji Rikitake / BCL Akihabara Mee4ng
5-OCT-2019 15
۩ମతͳํ๏ Ԇ৴߸Λଧͪফ͢ϑΟϧλΛ࡞Γɺͦͷ ϑΟϧλͷޮ͖ํΛΈ͕ͳ͘ͳΔΑ͏ʹஞ ࣍ௐ͍ͯ͘͠ ͦΜͳ͜ͱ͕Ͱ͖Δͷ͔? Kenji Rikitake / BCL Akihabara
Mee4ng 5-OCT-2019 16
దԠϑΟϧλΛ͑Ͱ͖Δ ඪ: ৼ෯ΛҰఆʹ͢Δ ৼ෯ͷࠩΛޡࠩͱஅ͢Δ ޡࠩΛͬͯϑΟϧλΛௐ Kenji Rikitake / BCL Akihabara
Mee4ng 5-OCT-2019 17
దԠϑΟϧλͷ࣮ྫ 1980ʹจൃද 1 ྛًࢯʹΑΔFMDDC-3 ྗʹΑΔairspy-fmradion 1 ݄ ࢤ, Ӌௗ ޫढ़,
దԠσΟδλϧϑΟϧλʹΑΔFMϚϧνύεͻͣΈࣗಈআڈͷҰํࣜ, ςϨϏδϣϯֶձࢽ, 1985, 39 ר, 3 ߸, p. 228-234, ެ։ 2011/03/14, Online ISSN 1884-9652, Print ISSN 0386-6831, h>ps:/ /doi.org/ 10.3169/itej1978.39.228, h>ps:/ /www.jstage.jst.go.jp/arHcle/itej1978/39/3/39_3_228/_arHcle/-char/ja Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019 18
airspy-fmradion 2 Airspy HF+RTL-SDRͱMacRaspberry PiͷΈ߹ΘͤͰಈ࡞ ߴڃFMνϡʔφʹඖఢ FMԕڑड৴ʹޮՌ ઈࢍ։ൃத 2 h$ps:/
/github.com/jj1bdx/airspy-fmradion Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019 19
Thank you Ques%ons? Kenji Rikitake / BCL Akihabara Mee4ng 5-OCT-2019
20