TV受信波を用いたヒト検知システムにおける時間ダイバーシチの適用

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(1)2006−MBL−39（1） 2006−ITS−27（1） 2006／11／16. 社団法人情報処理学会研究報告 IPSJ SIG Technical Report. TV ฃାᵄࠍ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߦ߅ߌࠆᤨ㑆࠳ࠗࡃ࡯ࠪ࠴ߩㆡ↪ ဈᧄ 㕏♿ 㜞ᯅ ⨃ ⷏ ᱜඳ ศ↰ ᓆ㗼 ᐢፉᏒ┙ᄢቇᄢቇ㒮 ᖱႎ⑼ቇ⎇ⓥ⑼ ᖱႎࡔ࠺ࠖࠕᎿቇኾ᡹ ޽ࠄ߹ߒ ᧄ⎇ⓥቶߢߪᣂߒ޿㒐‽ࠪࠬ࠹ࡓߣߒߡ㧘UHF Ꮺ TV ฃାᵄࠍ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓࠍឭ᩺ ߒߡ޿ࠆ㧚⃻࿷ߩࠪࠬ࠹ࡓߢߪ㧘1 ⑽೨ߣߩฃା࡟ࡌ࡞ߩᄌേ᏷㧔એਅ㧘ᄌേ࡟ࡌ࡞㧕ࠍ⸃ᨆߒ㧘ߘߩ࡟ࡌ ࡞߇޽ࠆ㑣୯ࠍ⿥߃ࠆ߆ุ߆ߢቶౝߩࡅ࠻ߩ᦭ήࠍ⼂೎ߒߡ޿ࠆ㧚ߒ߆ߒ㧘ࡅ࠻ߩേ߈ߪ᭽‫ࠅ޽ߢޘ‬㧘1 ⑽ ೨ߣߩᄌേ࡟ࡌ࡞ߩߺߢߪ⏕ታߦᬌ⍮ߢ߈ߥ޿േ߈߇޽ࠆ㧚ߒߚ߇ߞߡ㧘ࡅ࠻ߩേ߈ߦኻߔࠆ᭽‫ߥޘ‬ฃା࡟ ࡌ࡞ᄌേߦ߽ኻᔕߢ߈ࠆࠃ߁ߥ㧘ࠃࠅ㜞♖ᐲߥᬌ⍮ᣇᴺߩᬌ⸛߇ᔅⷐߢ޽ࠆ㧚ᧄ⎇ⓥߢߪ㧘᭽‫ߥޘ‬ฃା࡟ࡌ ࡞ᄌേߩᬌ⍮ࠍታ⃻ߔࠆߚ߼㧘ᤨ㑆࠳ࠗࡃ࡯ࠪ࠴㧔TDD㧦Time Delay Diversity㧕ߩ᭎ᔨࠍขࠅ౉ࠇ㧘᭽‫ޘ‬ ߥᤨ㑆Ꮕߦࠃࠆᄌേ࡟ࡌ࡞ࠍ↪޿ࠆᣂߚߥࡅ࠻ᬌ⍮ᣇᴺࠍᬌ⸛ߒߚ㧚ᧄឭ᩺ᣇᴺࠍㆡ↪ߒߚታ㛎⚿ᨐࠃࠅ㧘 ࡅ࠻ᬌ⍮⏕₸߇ 30㧑ᡷༀߢ߈ࠆߎߣࠍ᣿ࠄ߆ߦߒߚ㧚. Application of Time Delay Diversity to Human Detection System Using TV Receiving Waves Yasuki Sakamoto㧘Shigeru Takahashi㧘Masahiro Nishi㧘and Teruaki Yoshida Faculty of Information Sciences㧘Hiroshima City University㧘 3-4-1㧘Ozuka-higashi㧘Asa-minami-ku㧘Hiroshima㧘731-3194㧘Japan Abstract We have proposed the new human detection system using UHF band TV receiving waves. This system can detect the human presence in a room by monitoring whether the fluctuation level that is the difference of the received levels every one second exceeds a threshold or not. However, this system has a possibility of overlooking some fluctuation levels due to human various movements. Therefore, in our system, it is necessary to investigate the high accuracy detection method which can response various fluctuation levels with fading durations more or less than one second. In order to achieve the detection of the various fluctuation levels, we have studied the new human detection method with the Time Delay Diversity (TDD) technique.. 1. 䈲䈛䉄䈮 ⃻࿷㧘቟ᔃߢ቟ోߥ␠ળߩታ⃻߳ߩ㔛ⷐ߇㜞߹ߞ ߡ޿ࠆ㧚․ߦ㧘৻ᚭᑪߡߩኅደ߅ࠃ߮ࡑࡦ࡚ࠪࡦߥ ߤߩ૑ዬ߳ߩਇᱜଚ౉ߦኻߔࠆ㒐‽ᗧ⼂߇㜞߹ࠅߟ ߟ޽ࠆ㧚߹ߚන⁛ߢ↢ᵴߒߡ޿ࠆ㜞㦂⠪ߩ਎Ꮺᢙ߽ Ⴧട௑ะߦ޽ࠆ㧚ߎࠇࠄߩ⁁ᴫߩਅ㧘ࡅ࠻ߩଚ౉߿ ⇣Ᏹࠍᬌ⍮ߔࠆߎߣࠍ⋡⊛ߣߒߡ㧘ਥߦ⿒ᄖ✢߿ࡑ ࠗࠢࡠᵄᏪ㔚ᵄࠍ↪޿ߚ㧘ᄙߊߩࠪࠬ࠹ࡓ߇㐿⊒ߐ ࠇ㧘Ꮢ⽼ߐࠇࠆࠃ߁ߦߥߞߡ߈ߚ[1]㧚 ⪺⠪ࠄߪߎࠇ߹ߢ㧘વ៝․ᕈߩఝࠇࠆ UHF Ꮺ㔚 ᵄࠍ↪޿ߚή✢ㅢାⅣႺߩ᭴▽ࠍ⋡ᜰߒ㧘ደᄖ㧘ደ ౝߩ᭽‫ߥޘ‬႐ᚲߦ߅ߌࠆ㧘UHF Ꮺ TV ᡼ㅍᵄߩ㔚ᵄ વ៝․ᕈࠍ⎇ⓥߒߡ߈ߚ[2]㧚ደౝߦ߅ߌࠆ TV ᡼ㅍ ᵄߩฃା․ᕈࠍ⺞ߴࠆߚ߼᷹ቯࠍⴕߞߡ޿ߚ㓙㧘ደ ౝߦࡅ࠻߇ሽ࿷ߒߚ႐วߦ㔚ᵄߩฃା࡟ࡌ࡞߇ࡅ࠻ ߩേ߈ߦᔕߓߡᄌൻߔࠆߎߣࠍ⚻㛎ߒߚ㧚 ߎߩ⚻㛎߇ၮߣߥࠅ㧘⪺⠪ࠄߪࡅ࠻ߩଚ౉߿⇣Ᏹ ࠍᬌ⍮ߔࠆߎߣࠍ⋡⊛ߣߒߡ㧘ᣂߚߦ TV ฃାᵄࠍ ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓࠍឭ᩺ߒ㧘ߘߩᬌ⍮ࠛ࡝ࠕ ߿ᬌ⍮⏕₸ߥߤߩᬌ⍮ᕈ⢻ࠍ⹏ଔߒߡ߈ߚ[3][4]㧚ᧄ ࠪࠬ࠹ࡓߢߪ౏౒ᕈߩ㜞޿㧘቟ቯߒߚ಴ജߢㅍାߐ ࠇߡ޿ࠆ UHF Ꮺ TV ᡼ㅍᵄࠍ↪޿ࠆ㧚ߒߚ߇ߞߡ. ㅍାᯏࠍᣂߚߦ⸳⟎ߔࠆᔅⷐߪήߊ㧘ฃା♽ߩߺߢ ࠪࠬ࠹ࡓࠍ᭴▽ߔࠆߎߣ߇ߢ߈ࠆ㧚߹ߚ㧘ᧄࠪࠬ࠹ ࡓߪደౝߦ߅޿ߡᔅὼ⊛ߦ↢ߓࠆ㔚ᵄߩࡑ࡞࠴ࡄࠬ ࡈࠚ࡯࠺ࠖࡦࠣ߿㧘ࡅ࠻ߦࠃࠆࠪࡖ࠼࠙ࠗࡦࠣߦ⿠ ࿃ߒߚฃା࡟ࡌ࡞ᄌേߦࠃࠅࡅ࠻ࠍᬌ⍮ߔࠆ߽ߩߢ ޽ࠆ㧚ᧄࠪࠬ࠹ࡓߪ㧘ᓥ᧪ߩ⿒ᄖ✢߿ࡑࠗࠢࡠᵄᏪ 㔚ᵄࠍ↪޿ߚࠪࠬ࠹ࡓߢߪ࿎㔍ߢ޽ߞߚ㧘ㇱደో૕ ߦࠊߚࠆࡅ࠻ߩᬌ⍮߇ߢ߈ࠆ․ᓽࠍ᦭ߔࠆ[4]㧚 ⃻࿷ߩࠪࠬ࠹ࡓߢߪ㧘1 ⑽೨ߣߩฃା࡟ࡌ࡞ߩᄌ േ᏷㧔એਅ㧘ᄌേ࡟ࡌ࡞㧕ࠍ⸃ᨆߒ㧘ߘߩ࡟ࡌ࡞߇ ޽ࠆ㑣୯ࠍ⿥߃ࠆ߆ุ߆ߢቶౝߩࡅ࠻ߩ᦭ήࠍ⼂೎ ߒߡ޿ࠆ㧚ߒ߆ߒ㧘ࡅ࠻ߩേ߈ߪ᭽‫ࠅ޽ߢޘ‬㧘1 ⑽ ೨ߣߩᄌേ࡟ࡌ࡞ߩߺߢߪ⏕ታߦᬌ⍮ߢ߈ߥ޿േ߈ ߇޽ࠆ㧚ฃା࡟ࡌ࡞ᄌേࠍࠃࠅ⚦߆ߊ᷹ⷰߔࠆߣ㧘 1 ⑽ࠃࠅㅦ޿ᄌേ߿ㆃ޿ᄌേ߇ሽ࿷ߒ㧘⃻࿷ߩࡅ࠻ ᬌ⍮ࠪࠬ࠹ࡓߪߎߩᄌേࠍᬌ಴ߢ߈ߡ޿ߥ޿น⢻ᕈ ߇޽ࠆ㧚ߒߚ߇ߞߡ㧘ࡅ࠻ߩേ߈ߦኻߔࠆ᭽‫ߥޘ‬ฃ ା࡟ࡌ࡞ᄌേߦ߽ኻᔕߢ߈ࠆࠃ߁ߥ㧘ࠃࠅ㜞♖ᐲߥ ᬌ⍮ᣇᴺߩᬌ⸛߇ᔅⷐߢ޽ࠆ㧚 ᧄ⎇ⓥߢߪ㧘᭽‫ߥޘ‬ฃା࡟ࡌ࡞ᄌേߩᬌ⍮ࠍታ⃻ ߔࠆߚ߼㧘ᤨ㑆࠳ࠗࡃ࡯ࠪ࠴㧔TDD㧦Time Delay Diversity㧕ߩ᭎ᔨࠍขࠅ౉ࠇ㧘ⶄᢙߩᤨ㑆Ꮕߦࠃࠆ. −1−.

(2) (without person) Station. Received䇭Level. Broadcasting wave. Time. Broadcasting wave. (with person) Station. Received䇭Level. ᄌേ࡟ࡌ࡞ߩ୯ࠍ↪޿ࠆᣂߚߥࡅ࠻ᬌ⍮ᣇᴺࠍឭ᩺ ߔࠆ㧚ߘߒߡ㧘ታ㓙ߩታ㛎⚿ᨐࠍ〯߹߃㧘TDD ࠍㆡ ↪ߒߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߦ߅ߌࠆᬌ⍮⏕₸ߩᡷༀല ᨐࠍ␜ߔ㧚 ᧄ⺰ᢥߩ᭴ᚑߪએਅߩߣ߅ࠅߢ޽ࠆ㧚2.ߢߪ㧘UHF Ꮺ TV ฃାᵄࠍ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߩ᭎ⷐࠍㅀ ߴࠆ㧚3.ߢߪᧄឭ᩺ᣇᴺߩ⹏ଔࠍߔࠆߚ߼ߩ᷹ቯᣇ ᴺߥࠄ߮ߦ᷹ቯ⻉రࠍㅀߴࠆ㧚4.ߢߪࡅ࠻ߩേ߈ߦ ઻ߞߡᄌൻߔࠆฃା࡟ࡌ࡞ᄌേߩ․ᓽࠍ㧘⥄Ꮖ⋧㑐 ଥᢙߦࠃࠅቯ㊂⊛ߦ␜ߔ㧚5.ߢߪࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓ ߦㆡ↪ߔࠆ TDD ߦߟ޿ߡㅀߴࠆ㧚6.ߢߪ㧘TDD ࠍ ㆡ↪ߔࠆߎߣߦࠃߞߡ㧘ࡅ࠻ߩേ߈ࠍࠃࠅ♖ᐲࠃߊ ᬌ಴ߢ߈ࠆߎߣࠍᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸߿ᬌ⍮⏕₸ ߩታ㛎⚿ᨐߦၮߠ߈␜ߔ㧚7.ߪ߹ߣ߼ߢ޽ࠅ㧘ᧄ⺰ ᢥߩ⚿⺰߅ࠃ߮੹ᓟߩ⎇ⓥ⺖㗴ߦߟ޿ߡㅀߴࠆ㧚. Time. ࿑ 1㧦ࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߩේℂ. Antenna PC. 2. TV ฃାᵄ䉕↪䈇䈢䊍䊃ᬌ⍮䉲䉴䊁䊛 2.1. ࠪࠬ࠹ࡓߩේℂ ࿑㧝ߦ㨀㨂ฃାᵄࠍ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߩේ ℂࠍ␜ߔ㧚ደౝⅣႺߢߪ㧘ᐥ߿ოߥߤߩ㊄ዻ⵾‛૕ ߦ߅޿ߡ㔚ᵄ߇෻኿ߒ㧘ⶄᢙߩ㔚ᵄ⚻〝߇↢ᚑߐࠇ ࠆࡑ࡞࠴ࡄࠬⅣႺߣߥߞߡ޿ࠆ㧚TV ᡼ㅍᵄߪ㧘ዬ ቶ߹ߢߩⓨ㑆ߢߪ߶߷⋥ធ೔᧪ߔࠆ߇㧘ደౝߦ౉ߞ ߚᓟ㧘෻኿ࠍ➅ࠅ㄰ߔߎߣߦࠃࠅ㧘ࡑ࡞࠴ࡄࠬⅣႺ ࠍ᭴ᚑߔࠆ㧚ደౝߦࡅ࠻߇޿ߥ޿႐ว㧘ደౝߩࡑ࡞ ࠴ࡄࠬⅣႺߪᄌൻߒߥ޿ߚ߼㧘቟ቯߒߚ࡟ࡌ࡞ߢ㔚 ᵄࠍฃାߢ߈ࠆ㧚৻ᣇ㧘ደౝߦࡅ࠻߇޿ࠆ႐ว㧘ࡅ ࠻ߩേ߈ߦࠃࠅ෻኿ᵄߩ⚻〝߇ᄌࠊࠆߚ߼㧘ฃାߐ ࠇࠆⶄᢙߩ㔚ᵄߩ૏⋧߅ࠃ߮ᝄ᏷߇ᄌൻߒ㧘ฃା࡟ ࡌ࡞ߪᄢ߈ߊᄌേߔࠆ㧚 ߎߩࠃ߁ߦᧄࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߪ㧘ࡅ࠻ߩേ߈ߦ ࠃࠅฃା࡟ࡌ࡞߇ᄌേߔࠆߎߣࠍ೑↪ߒ㧘ደౝߩࡅ ࠻ߩ᦭ήࠍᬌ⍮ߒࠃ߁ߣߔࠆ߽ߩߢ޽ࠆ㧚. 2.2. ࠪࠬ࠹ࡓߩ᭴ᚑ ࿑ 2 ߦࠪࠬ࠹ࡓߩၮᧄ᭴ᚑࠍ␜ߔ㧚 ᧄࠪࠬ࠹ࡓߪ㧘 ฃାㇱࠃࠅฃା࡟ࡌ࡞ࠍขᓧߒ㧘ᬌ⍮ㇱࠃࠅ࠺࡯࠲ ⸃ᨆࠍⴕ޿㧘ࡅ࠻ᬌ⍮ࠍታ⃻ߔࠆ㧚 ฃାࠕࡦ࠹࠽ߦߪ㧘ࡑ࡞࠴ࡄࠬ㔚ᵄࠍലᨐ⊛ߦฃ ାߔࠆߚ߼ߦ㧘ᜰะᕈߩᐢ޿ࡕࡁࡐ࡯࡞ࠕࡦ࠹࠽ࠍ ೑↪ߔࠆ㧚߹ߚ㧘TV ᡼ㅍᵄࠍฃାߔࠆߚ߼㧘ㅍା ᯏߩᔅⷐ߇ߥߊ㧘ฃାᯏߩߺߢࠪࠬ࠹ࡓࠍ᭴ᚑߢ߈ ࠆ㧚ߎߩߚ߼㧘ࠪࠬ࠹ࡓࠍࠪࡦࡊ࡞ߦ᭴ᚑߔࠆߎߣ ߇ߢ߈ࠆ㧚. 2.3. TV ฃାᵄߩ․ᓽ ㅍାḮߣߒߡ⌕⋡ߒߚ NTSC-TV ᡼ㅍᵄߪ㧘ᤋ௝ ៝ㅍᵄ㧘⦡೽៝ㅍᵄ㧘㖸ჿ៝ㅍᵄߩ㧟ߟߩ៝ㅍᵄ߆ ࠄ᭴ᚑߐࠇߡ޿ࠆ㧚ᚒ‫៝ߩߘߪޘ‬ㅍᵄߩਛߢ߽㧘㖸 ჿ៝ㅍᵄߪઁߩ᡼ㅍᵄߣᲧセߒߡ࡟ࡌ࡞ᄌേ߇ዋߥ ޿ߎߣࠍ⏕⹺ߒߚ[3]㧚㖸ჿ៝ㅍᵄ߇ઁߩ៝ㅍᵄߦᲧ ߴ቟ቯߒߡ޿ࠆℂ↱ߣߒߡߪ㧘ᤋ௝ାภ߅ࠃ߮⦡ା ภߪ AM ᄌ⺞ߢ޽ࠅ㧘ⵍᄌ⺞ାภߩౝኈߦࠃࠅᄌേ ߔࠆߩߦኻߒ㧘㖸ჿାภߪ FM ᄌ⺞ߢ޽ࠅ㧘ⵍᄌ⺞ −2−. Receiver. ADC. ࿑ 2㧦ࠪࠬ࠹ࡓߩၮᧄ᭴ᚑ ାภߩౝኈߦࠃࠄߕቯᝄ᏷ߢ޽ࠆ߆ࠄߢ޽ࠆ㧚ߎߩ ߚ߼㧘ᧄታ㛎ߢ↪޿ߚฃାᯏߢߪ㧘㖸ჿାภߩฃା ࡟ࡌ࡞ߪ߶ߣࠎߤ৻ቯߣߥࠆ㧚 ߟ߹ࠅ㧘ࡅ࠻ᬌ⍮ߦ ᔅⷐߣߥࠆ቟ቯߒߚㅍାḮߣߒߡ㧘TV ାภߦ߅ߌ ࠆ㖸ჿ៝ㅍᵄ߇೑↪น⢻ߢ޽ࠆ㧚. 3. 䊍䊃ᬌ⍮䉲䉴䊁䊛䈱᷹ቯ⻉ర 3.1. ᷹ቯࠪࠬ࠹ࡓ᭴ᚑ ⴫ 1 ߦᧄ᷹ቯߢ↪޿ߚ㔚ᵄ᷹ቯࠪࠬ࠹ࡓߩ⻉రࠍ ␜ߔ㧚ฃାࠕࡦ࠹࠽ߦߪ㧘㐳ߐ߇ᵄ㐳ǳߩ 4 ಽߩ 1 㧔߅ࠃߘ 10㨪15 cm㧕ߢ޽ࠆࡕࡁࡐ࡯࡞ࠕࡦ࠹࠽ࠍ ↪޿ߚ㧚ࠕࡦ࠹࠽ߢฃାߐࠇߚ㔚ᵄߪ㧘ฃାᯏߢᬌ ᵄߐࠇ㧘A-D ࠦࡦࡃ࡯࠲ࠍ੺ߒߡ࠺ࠖࠫ࠲࡞࠺࡯࠲ ߦᄌ឵ᓟ㧘PC ߢㅪ⛯⸥㍳ߐࠇࠆ㧚ฃାࠕࡦ࠹࠽㜞 ߪ㧘᧍ߩ㜞ߐߣห⒟ᐲߢ޽ࠆ 75 cm ߣߒߚ㧚߹ߚ㧘 ᷹ቯߦ↪޿ߚฃାᯏߩ 3 dB Ꮺၞ᏷ߪ 230 kHz㧘ᔕ ╵ㅦᐲߩ㒢⇇ߪ 500 ms ߢ޽ࠆ㧚. 3.2. ᷹ቯⅣႺ ࿑ 3㧘࿑ 4 ߦታ㛎ࠍⴕߞߚ᷹ቯⅣႺࠍ␜ߔ㧚᷹ቯ ߪ 6 㓏߆ࠄߥࠆᐢፉᏒ┙ᄢቇᖱႎ⑼ቇㇱ᫟೎㙚ߩ 5 㓏㧔࿑ 3㧦᷹ቯㇱደԘ㧕㧘߹ߚ 8 㓏߆ࠄߥࠆᐢፉᏒ ┙ᄢቇᖱႎ⑼ቇㇱ᫟ߩ 8 㓏㧔࿑ 4㧦᷹ቯㇱደԙ㧕ߩ ቶౝߢⴕ޿㧘᷹ቯࠪࠬ࠹ࡓߪㇱደߩਛᔃߦ⸳⟎ߒߚ㧚 ᷹ቯቶౝߩ᧚⾰ߪၮᧄ⊛ߥ㛽⚵ߺ߇シ㊂㋕㛽ߢ㧘ᐥ 㕙ߪࡆ࠾࡯࡞ࠪ࡯࠻ᒛࠅ㧘ო᧚ߦ⍹⤉ࡏ࡯࠼ࠍ૶↪ ߒߡ޿ࠆ㧚᷹ቯㇱደԘ߅ࠃ᷹߮ቯㇱደԙߩᐢߐߪߘ ࠇߙࠇ㧘6.8 㨙6.9 㨙3.0 㨙ߩ⚂ 47 㨙2㧘3.5 㨙 6.9 㨙3.0 㨙ߩ⚂ 24 m2 ߢ޽ࠆ㧚ฦ᷹ቯㇱደߦ ߪ᧍ߣ᫹ሶ߅ࠃ߮ࡎࡢࠗ࠻ࡏ࡯࠼߿ࠬ࠴࡯࡞ࡠ࠶ࠞ ╬ߩ᧚ᢱߦ㊄ዻ߇฽߹ࠇࠆੲེ߇⟎߆ࠇߡ޿ࠆ㧚߹ ߚ㧘⓹ߩ 㕙ߦߪ㊄ዻ⵾ߩ✂ᚭ߇⸳⟎ߐࠇߡ޿ࠆ㧚.

(3) ⴫ 1㧦᷹ቯࠪࠬ࠹ࡓ⻉ర. 3.3. ᷹ቯ⻉ర ⴫ 2 ߦ᷹ቯߦ೑↪ߒߚ᡼ㅍዪߩ⻉రࠍ␜ߔ㧚᷹ቯ ߢ೑↪ߒߚ᡼ㅍዪߪ㧘ᐢፉᏒ┙ᄢቇ߆ࠄߩ〒㔌߇ᦨ ߽ㄭ޿Ꮖ᢫᡼ㅍዪߣߒߚ㧚ᧄ᡼ㅍዪߪ㧘᷹ቯㇱደԘ ߅ࠃ᷹߮ቯㇱደԙ߆ࠄߘࠇߙࠇධ߳ 1.8 km㧘1.9 km 㔌ࠇߚ႐ᚲߦሽ࿷ߔࠆ㧚߹ߚ㧘ฦ᷹ቯㇱደߣ᡼ㅍዪ ߩ㑆ߦߪㆤ߳޿‛ߣߥࠆጊ߿ᑪ▽‛߇ߥߊ㧘⷗ㅢߒ 㧔LOS㧦Line Of Sight㧕વ៝〝߇ሽ࿷ߔࠆⅣႺߢ޽ ࠆ㧚߹ߚ㧘ฦ᷹ቯㇱደߩᮡ㜞ߪ᡼ㅍዪߩᮡ㜞㧔445.8 m㧕ࠃࠅ⚂ 200 m ૐߊ㧘᡼ㅍᵄ߇᷹ቯㇱደߦ߶߷᳓ ᐔߦ౉኿ߔࠆⅣႺߢ޽ࠆ㧚ᧄ᷹ቯߢߪ㧘Ꮖ᢫᡼ㅍዪ ࠃࠅㅍାߐࠇߡ޿ࠆ Ch.38 ߩ㖸ჿ៝ㅍᵄ㧔625.75 MHz㧕ࠍ೑↪ߒ᷹ቯࠍⴕߞߚ㧚. Receiving antenna. Monopole antenna. Antenna length. ǌ/4. Antenna height. 75 cm. Receiver bandwidth. 230 kHz. Receiver limitation. -105 dBm. Sampling limitation. 500 ms. A/D quantization. 13 bit. 6.8m. 4. 䊍䊃䈱േ䈐䈮઻䈉ฃା䊧䊔䊦ᄌേ. 1. 㨯㨯㨯㧔1㧕. N. ¦ i. 1. ( xi‫ޓ‬ ‫ޓ‬ x). Arrival Direction. i. Arrival Direction. r. of Broadcast Wave. ࿑ 3㧦᷹ቯⅣႺ㧔᷹ቯㇱደԘ㧕. Window. 3.5m. 6.9m. Steel locker Receiver. Desk. (x‫ޓ‬ x ) ( x iW ‫ޓ‬ ‫ޓ‬ x) i ‫ޓ‬. Window. Door. ⥄Ꮖ⋧㑐ଥᢙߣߪ㧘޽ࠆᤨ♽೉࠺࡯࠲ߣᢙ࠲ࠗࡓ ࠬ࠹࠶ࡊߕࠄߒߚ࠺࡯࠲㑆ߩ⋧㑐ߩ㜞ߐࠍ⴫ߔ߽ߩ ߢ޽ࠆ㧚⥄Ꮖ⋧㑐ଥᢙߦࠃߞߡ㧘ㆊ෰ߩጁᱧߦኻߒ ߡߤߩߊࠄ޿⋧㑐ࠍᜬߟ߆ࠍ⍮ࠆߎߣ߇ߢ߈ࠆ㧚⥄ Ꮖ⋧㑐ଥᢙ߇චಽߦዊߐߊߥࠆᤨ㑆Ꮕߦ߅ߌࠆᄌേ ࡟ࡌ࡞ߪ㧘ㆊ෰ߩ࠺࡯࠲ߣߩ⋧㑐߇ߥߊߥࠆߚ߼ᄢ ߈ߊߥࠆߣ⠨߃ࠄࠇ㧘ߎࠇࠍㆡಾߥᤨ㑆Ꮕߣ⠨߃ࠆ ߎߣ߇ߢ߈ࠆ㧚ߒߚ߇ߞߡᧄ⎇ⓥߢߪ㧘᭽‫࠻ࡅߥޘ‬ ߩേ߈ߦኻߔࠆㆡಾߥᤨ㑆Ꮕࠍ᳞߼ࠆ㓙ߦ㧘⥄Ꮖ⋧ 㑐ଥᢙࠍ↪޿ߚ㧚 ⥄Ꮖ⋧㑐ଥᢙ㨞ߪએਅߩᑼ㧔1㧕ߢ᳞߼ࠄࠇࠆ[5]㧚. ¦W. Receiver. White Board. 4.2. ⥄Ꮖ⋧㑐ଥᢙ. N. 6.9m. White Board. ⃻࿷ߩࠪࠬ࠹ࡓߢߪ㧘1 ⑽೨ߣߩᄌേ࡟ࡌ࡞ࠍ⸃ ᨆߒ㧘ߘߩ୯߇޽ࠆ㑣୯ࠍ⿥߃ࠆ߆ุ߆ߢቶౝߩࡅ ࠻ߩ᦭ήࠍ⼂೎ߒߡ޿ࠆ[4]㧚ߒ߆ߒ㧘ࡅ࠻ߩേ߈ߪ ᭽‫ࠅ޽ߢޘ‬㧘1 ⑽ࠃࠅㅦ޿߽ߒߊߪㆃ޿ฃା࡟ࡌ࡞ ߩᄌേ߇޽ࠆ㧚 ࿑ 5㧘 ࿑ 6 ߦ㧘 ߘࠇߙࠇ⒖േㅦᐲ 2.0 [m/s]㧘 0.5 [m/s] ߩࡅ࠻߇᷹ቯㇱደԘߦሽ࿷ߒߡ޿ࠆ႐วߩฃା࡟ࡌ ࡞ߩᄌേߩ᷹ቯ଀ࠍ␜ߔ㧚࿑ 5 ࠃࠅ㧘1 ⑽ࠃࠅ߽⍴ ޿㑆㓒ߢᄢ߈ߊฃା࡟ࡌ࡞߇⪭ߜㄟࠎߢ޿ࠆߎߣࠍ ⏕⹺ߔࠆߎߣ߇ߢ߈ࠆ㧚߹ߚ㧘࿑ 6 ߆ࠄߪᢙ⑽߆ߌ ߡฃା࡟ࡌ࡞߇ᄢ߈ߊ⪭ߜㄟࠎߢ޿ࠆߎߣ߇ಽ߆ࠆ㧚 ߟ߹ࠅ㧘1 ⑽೨ߣߩᄌേ࡟ࡌ࡞ࠍ᳞߼ࠆߛߌߢߪ㧘 ᭽‫ߩ࠻ࡅߥޘ‬േ߈ߦ઻߁ฃା࡟ࡌ࡞ߩᄌേࠍ⷗ㅏߒ ߡߒ߹߁น⢻ᕈ߇޽ࠆ㧚 ߒߚ߇ߞߡ㧘᭽‫ߥޘ‬⒖േㅦᐲߩࡅ࠻ߩേ߈ࠍ㜞♖ ᐲߦᬌ⍮ߔࠆߚ߼ߦߪ㧘ⶄᢙߩᤨ㑆Ꮕߦ߅ߌࠆᄌേ ࡟ࡌ࡞ߩ୯ࠍ↪޿ࠆߎߣ߇᦭ലߢ޽ࠆ㧚. of Broadcast Wave. Desk. 4.1. ᭽‫ߥޘ‬േ߈ߦ઻߁ฃା࡟ࡌ࡞ᄌേ. Door ࿑ 4㧦᷹ቯⅣႺ㧔᷹ቯㇱደԙ㧕 ⴫ 2㧦᡼ㅍዪ⻉ర Station. Koi. Measured frequency. 625.75 MHz. Transmission power. 2.5 W. Orthometric height. 445.8 m. ߩᤨ♽೉࠺࡯࠲㧘Wߪᤨ㑆Ꮕ㧘 x ߪᤨ♽೉࠺࡯࠲ߩ ᐔဋ୯ࠍ⴫ߔ㧚. 4.3. ฦ⒖േㅦᐲߦ߅ߌࠆ⥄Ꮖ⋧㑐ଥᢙ. ߎߎߢ㧘 N ߪᤨ♽೉࠺࡯࠲ߩ୘ᢙ㧘xi ߪ i ⇟⋡. ᧄ⎇ⓥߢߪ㧘ࡅ࠻߇ቶౝࠍㅦ޿േ߈㧔2.0 [m/s]㧕㧘 ㆃ޿േ߈㧔0.5 [m/s]㧕ߢ⒖േߒߚ႐วߢߩฃା࡟ࡌ ࡞ᄌേߩታ㛎࠺࡯࠲ࠍၮߦߒߡ㧘᭽‫ᤨߥޘ‬㑆Ꮕߦ߅. −3−.

(4) 5.㩷䊍䊃ᬌ⍮䉲䉴䊁䊛䈮䈍䈔䉎 TDD ㆡ↪ 5.1. TDD㧔ᤨ㑆࠳ࠗࡃ࡯ࠪ࠴㧕ߦߟ޿ߡ. Recieved Level [dBm]. -70 -72 -74 -76 -78 -80 0. ࿑ 11 ߦ㧘ᧄࠪࠬ࠹ࡓߦ߅ߌࠆ TDD ㆡ↪ᣇᴺࠍ␜ ߔ㧚౉ജାภ x i ߦኻߒߡ㧘ⶄᢙߩᤨ㑆Ꮕ㧔W㧝㧘W㧞㧘«㧘. W㨚㧕೨ߣߩᄌേ࡟ࡌ࡞ࠍ᳞߼ࠆ㧚ߘߒߡ㧘᳞߼ࠄࠇ ߚ୯ߩ⛘ኻ୯ࠍᲧセߒ㧘ߘߩᦨᄢ୯ࠍࡅ࠻ᬌ⍮ߦ↪ ޿ࠆᄌേ࡟ࡌ࡞ߣߔࠆ㧚 ߎߩࠃ߁ߦ㧘TDD ࠍㆡ↪ߔࠆߎߣߦࠃࠅࠕࡦ࠹࠽ ߿ฃାᯏߩᢙࠍჇ߿ߔߎߣߥߊ㧘◲ᤃߥⵝ⟎ߢࡅ࠻ ᬌ⍮ᕈ⢻ࠍะ਄ߐߖࠆߎߣ߇ߢ߈ࠆ㧚 −4−. 30. 40. 50. Received Level [dBm]. -70 -72 -74 -76 -78 -80 0. 10. 20. 30. 40. 50. Time [s]. ࿑ 6㧦ฃା࡟ࡌ࡞ᄌേ଀㧔0.5 [m/s]㧕 1 0.8 0.6 0.4 0.2 0 -0.2 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12. Time Difference [s]. Autocorrelation Coefficient. ࿑ 7㧦⥄Ꮖ⋧㑐ଥᢙ㧔2.0 [m/s]㧕᷹ቯㇱደԘ 1 0.8 0.6 0.4 0.2 0 -0.2 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12. Time Difference [s]. ࿑ 8㧦⥄Ꮖ⋧㑐ଥᢙ㧔0.5 [m/s]㧕᷹ቯㇱደԘ Autocorrelation Coefficient. 5.2. TDD ࠍㆡ↪ߒߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓ. 20. ࿑ 5㧦ฃା࡟ࡌ࡞ᄌേ଀㧔2.0 [m/s]㧕. 0. વ៝ᄌേ߇ⓨ㑆߿๟ᵄᢙߥߤߢ⇣ߥࠆߎߣࠍ೑↪ ߒ㧘ⶄᢙߩฃାᨑ㧔⇣ߥࠆࠕࡦ࠹࠽㧘⇣ߥࠆ๟ᵄᢙ㧘 ⇣ߥࠆ஍ᵄߥߤ㧕ࠍ↪ᗧߒ㧘ߘࠇࠄߦ߅ߌࠆฃା㔚 ജࠍวᚑ߹ߚߪಾࠅᦧ߃ࠆߥߤߒߡવ៝ᄌേࠍᷫዋ ߐߖࠆᣇᴺࠍ࠳ࠗࡃ࡯ࠪ࠴ߣ޿߁㧚ߘߒߡᤨ㑆࠳ࠗ ࡃ࡯ࠪ࠴㧔TDD㧦Time Delay Diversity㧕ߪ㧘৻ቯ ᤨ㑆㑆㓒ߢห৻ᖱႎࠍⶄᢙ࿁ㅍାߒ㧘ߘߩㆃᑧߒߚ ᖱႎࠍ↪޿ߡㅢାຠ⾰ࠍะ਄ߐߖࠆᣇᴺߢ޽ࠆ[6]㧚 ᧄ⎇ⓥߢߪࠃࠅ㜞♖ᐲߥࡅ࠻ᬌ⍮ᣇᴺࠍታ⃻ߔࠆ ߚ߼㧘਄⸥ߢㅀߴߚ TDD ߩ᭎ᔨࠍᧄࡅ࠻ᬌ⍮ࠪࠬ ࠹ࡓߦㆡ↪ߒߚ㧚TDD ࠍㆡ↪ߒߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓ ߢߪ㧘1 ⑽೨ߣߩฃା࡟ࡌ࡞Ꮕ߆ࠄ▚಴ߐࠇࠆᄌേ ࡟ࡌ࡞ߩߺߢߥߊ㧘ⶄᢙߩᤨ㑆Ꮕߢᄌേ࡟ࡌ࡞ࠍ᳞ ߼㧘࠳ࠗࡃ࡯ࠪ࠴ലᨐߦߡࠃࠅᄢ߈ߥᄌേ࡟ࡌ࡞ࠍ ᓧࠃ߁ߣߔࠆ߽ߩߢ޽ࠆ㧚. 10. Time [s]. Autocorrelation Coefficient. ߌࠆ⥄Ꮖ⋧㑐ଥᢙࠍ᳞߼ߚ㧚 ࿑ 7㧘࿑ 8 ߪ᷹ቯㇱደԘߦ߅޿ߡ㧘࿑ 9㧘࿑ 10 ߪ ᷹ቯㇱደԙߦ߅޿ߡⴕߞߚታ㛎࠺࡯࠲ࠍၮߦ㧘ߘࠇ ߙࠇ⒖േㅦᐲ 2.0 [m/s]㧘0.5 [m/s]ߦ߅ߌࠆฃା࡟ࡌ ࡞ߩ⥄Ꮖ⋧㑐ଥᢙࠍ␜ߔ㧚⥄Ꮖ⋧㑐ଥᢙࠍ᳞߼ࠆߚ ߼ߦ㧘ᧄታ㛎ߢߪ N = 800 ୘ߩ࠺࡯࠲ࠍ↪޿ߚ㧚ᧄ ⎇ⓥߢߪ㧘⋧㑐߇ዊߐߊߥࠆ୯ߣߒߡ㧘⥄Ꮖ⋧㑐ଥ ᢙ 0.2 ࠍ⋡቟ߣߒߚ㧚 ฦ࿑ߦ߅޿ߡ㧘⥄Ꮖ⋧㑐ଥᢙ߇ 0.2 ߦߥࠆᤨ㑆Ꮕ ࠍ⺞ߴࠆߣ㧘᷹ቯㇱደԘߩ႐ว㧘2.0 [m/s]ߢߪ 1.0 ⑽ᧂḩ㧘0.5 [m/s] ߢߪ 3.0 ⑽ᧂḩߢ޽ߞߚ㧚߹ߚ㧘 ᷹ቯㇱደԙߩ႐ว㧘2.0 [m/s]ߢߪ 1.0 ⑽ᧂḩ㧘0.5 [m/s] ߢߪ 4.0 ⑽ᧂḩߢ޽ߞߚ㧚߹ߚ㧘⥄Ꮖ⋧㑐ଥ ᢙߪ⒖േㅦᐲ߇ 2.0 [m/s]ߩ႐ว㧘0.5 [m/s]ߩ႐วߣ Ყセߒߡ㧘ᕆỗߦᷫዋߒߡ޿ࠆߎߣ߇ಽ߆ࠆ㧚ߒߚ ߇ߞߡ㧘ࡅ࠻ߩ⒖േㅦᐲ߇ㅦ޿߶ߤ㧘⍴޿ᤨ㑆Ꮕߢ ⥄Ꮖ⋧㑐ଥᢙ߇ᷫዋߔࠆߎߣ߇ಽ߆ࠆ㧚 ߎߩࠃ߁ߦ㧘ࡅ࠻ߩേ߈ߩㅦᐲߦࠃߞߡ⥄Ꮖ⋧㑐 ଥᢙ߇ዊߐߊߥࠆᤨ㑆Ꮕ߇⇣ߥࠆߎߣߦࠃࠅ㧘ࡅ࠻ ᬌ⍮ߩ㓙ߦ↪޿ࠆᄌേ࡟ࡌ࡞ࠍ᳞߼ࠆᤨ㑆Ꮕࠍⶄᢙ ቯ߼ࠆᔅⷐ߇޽ࠆߎߣ߇ಽ߆ࠆ㧚 ᧄ⚿ᨐ߆ࠄ㧘ᄌേ࡟ࡌ࡞ࠍ᳞߼ࠆ㓙ߦ↪޿ࠆᤨ㑆 Ꮕࠍ㧘ࡅ࠻ߩ⒖േㅦᐲ߇ 2.0 [m/s]ߩ႐ว 0.5 ⑽㧘0.5 [m/s]ߩ႐ว 4.0 ⑽ߣߔࠆߎߣߢ㧘᷹ቯㇱደԘ߅ࠃ߮ ᷹ቯㇱደԙߦ߅޿ߡ߽㧘ߘࠇߙࠇߩࡅ࠻ߩേ߈ࠍല ₸⊛ߦᬌ⍮ߢ߈ࠆߎߣ߇ᦼᓙߐࠇࠆ㧚. 1 0.8 0.6 0.4 0.2 0 -0.2 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12. Time Difference [s]. ࿑ 9㧦⥄Ꮖ⋧㑐ଥᢙ㧔2.0 [m/s]㧕᷹ቯㇱደԙ.

(5) Autocorrelation Coefficient. 6.2. ᄌേ࡟ࡌ࡞ߣ⥄Ꮖ⋧㑐ଥᢙߦߟ޿ߡ 1 0.8 0.6 0.4 0.2 0 -0.2 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12. Time Difference [s]. ࿑ 10㧦⥄Ꮖ⋧㑐ଥᢙ㧔0.5 [m/s]㧕᷹ቯㇱደԙ {x1 , x2 , ‫ޓ‬ ...‫ޓ‬ , xi }. { y1 , y2 , ‫ޓ‬ ..., yi } 䋫. W 1[s]. 䋫. 䌼䊶䌼. 䋭. 䊶䊶䊶䊶䊶䊶䊶. W 2[s]. 䋭. Wn [s]. 䋫. 䋫. 䌼䊶䌼. 䋭. MAX. 䋫. 䋫. 䌼䊶䌼. ࿑ 11㧦TDD ߩㆡ↪ᣇᴺ. 6. ᷹ቯ⚿ᨐ෸䈶⠨ኤ 6.1. TDD ㆡ↪⚿ᨐ ࿑ 12㧘࿑ 13 ߦ᷹ቯㇱደԘ㧘࿑ 14㧘࿑ 15 ߦ᷹ቯ ㇱደԙߢߩታ㛎࠺࡯࠲ࠍၮߦ㧘ߘࠇߙࠇࡅ࠻ߩ⒖േ ㅦᐲ߇ 2.0 [m/s]㧘0.5 [m/s]ߦ߅ߌࠆฦᤨ㑆Ꮕ㧔0.5㧘 1.0㧘2.0㧘4.0㧘7.0 ⑽㧕ߩᄌേ࡟ࡌ࡞㧘߅ࠃ߮ TDD ࠍㆡ↪ߒߚ㓙ߩᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸ࠍ␜ߔ㧚߹ߚ㧘 ࡅ࠻ߥߒߦ߅ߌࠆ TDD ࠍㆡ↪ߒߚ㓙ߩᄌേ࡟ࡌ࡞ ߣ㧘ᓥ᧪ߩࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߦ೑↪ߒߡ޿ߚ 1 ⑽೨ ߣߩᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸߽࿑ 12㧘࿑ 14 ߦ޽ࠊߖ ߡ␜ߔ㧚4.3.▵ߩ⚿ᨐߦࠃࠅ㧘TDD ߦߪ 4.0 ⑽㧘2.0 ⑽㧘1.0 ⑽㧘0.5 ⑽ߩ 4 ⒳㘃ߩᤨ㑆Ꮕߦ߅ߌࠆᄌേ࡟ ࡌ࡞ࠍ↪޿ߚ㧚ߘࠇߙࠇߩ୯ߪᦨዊᤨ㑆Ꮕ 0.5 ⑽ߦ ኻߔࠆ 2 ߩߴ߈ਸ਼ߩ୚ᢙߣߒߚ㧚 ࿑ 12㧘࿑ 13 ࠃࠅ㧘⚥Ⓧ⏕₸ߩ 10 㧑୯ࠍ᳞߼ࠆ ߣ㧘ࡅ࠻ߩ⒖േㅦᐲ߇ 2.0 [m/s]㧘0.5 [m/s]ߩߤߜࠄ ߦ߅޿ߡ߽㧘ฦᤨ㑆Ꮕߣߩᄌേ࡟ࡌ࡞ߦᲧߴ㧘TDD ࠍㆡ↪ߒߚ႐วߩᄌേ࡟ࡌ࡞߇ 1 dB એ਄ᄢ߈ߊߥ ߞߡ޿ࠆߎߣ߇ಽ߆ࠆ㧚߹ߚ࿑ 14㧘࿑ 15 ࠃࠅ㧘⚥ Ⓧ⏕₸ߩ 10 㧑୯ࠍ᳞߼ࠆߣ㧘ฦᤨ㑆Ꮕߣߩᄌേ࡟ ࡌ࡞ߦᲧߴ㧘TDD ࠍㆡ↪ߒߚ႐วߩᄌേ࡟ࡌ࡞߇㧘 ࡅ࠻ߩ⒖േㅦᐲ߇ 2.0 [m/s]ߩߣ߈ 4dB એ਄㧘0.5 [m/s]ߩߣ߈ 1 dB એ਄ᄢ߈ߊߥߞߡ޿ࠆߎߣ߇ಽ߆ ࠆ㧚ߒߚ߇ߞߡ㧘ᧄᚻᴺࠍㆡ↪ߔࠆߎߣߦࠃࠅ㧘ࡅ ࠻ߩേ߈ߦ઻ߞߡᄌൻߔࠆฃା࡟ࡌ࡞ᄌേࠍ㧘޿ߕ ࠇߩ᷹ቯㇱደౝߦ߅޿ߡ߽㧘ࠃࠅ♖ᐲࠃߊᬌ಴ߢ߈ ࠆߎߣ߇ಽ߆ߞߚ㧚 ߐࠄߦ㧘࿑ 12㧘࿑ 14 ࠃࠅ㧘ቶౝߦࡅ࠻߇޿ߥ޿ ႐วߦ߅޿ߡ㧘TDD ࠍㆡ↪ߒߚ႐วߦ߅ߌࠆᄌേ࡟ ࡌ࡞ߪ 0.3 dB એਅߣචಽߦዊߐߊ㧘⺋ᬌ⍮߽ዋߥߊ ߢ߈ࠆߎߣ߇ᦼᓙߐࠇࠆ㧚 −5−. ⒖േㅦᐲ߇ 0.5 [m/s]ߩ႐วߩ࿑ 13㧘࿑ 15 ߦ߅޿ ߡ㧘0.5 ⑽߆ࠄ 4.0 ⑽߹ߢߩᤨ㑆Ꮕߦ߅ߌࠆ⚥Ⓧ⏕ ₸ߩ 10 㧑୯ࠍ⺞ߴࠆߣ㧘ᤨ㑆Ꮕ߇ᄢ߈ߊߥࠆߦߟ ࠇߡ㧘ᄌേ࡟ࡌ࡞߽ᄢ߈ߊߥߞߡ޿ࠆߎߣ߇ಽ߆ࠆ㧚 ߎߎߢ㧘࿑ 8㧘࿑ 10 ߩฦᤨ㑆Ꮕ߅ߌࠆ⥄Ꮖ⋧㑐ଥᢙ ࠍ᳞߼ࠆߣ㧘᷹ቯㇱደԘߩ႐ว㧘ᤨ㑆Ꮕ߇ 0.5 ⑽ߦ ߅ߌࠆ⥄Ꮖ⋧㑐ଥᢙ߆ࠄ㗅ߦ㧘0.7㧘0.5㧘0.2㧘0.1 ߢ޽ࠅ㧘᷹ቯㇱደԙߩ႐ว㧘0.8㧘0.6㧘0.4㧘0.1 ߩ ࠃ߁ߦ㧘ዊߐߊߥߞߡ޿ࠆߎߣ߇ಽ߆ࠆ㧚ߟ߹ࠅ㧘 ⥄Ꮖ⋧㑐ଥᢙ߇ዊߐߊߥࠆߦߟࠇ㧘ᄌേ࡟ࡌ࡞߇ᄢ ߈ߊߥߞߡ޿ࠆߎߣ߇ಽ߆ࠆ㧚 ߹ߚ࿑ 12㧘࿑ 14 ߦ߅޿ߡ㧘ᤨ㑆Ꮕ߇ 7.0 ⑽ߦ߅ ߌࠆ⚥Ⓧ⏕₸ߩ 10 㧑୯ࠍ᳞߼ࠆߣ㧘ᤨ㑆Ꮕ߇ 1.0 ⑽㧘2.0 ⑽㧘4.0 ⑽ߩ႐วߣ߶ߣࠎߤᏅ߇ߥ޿ߎߣ߇ ಽ߆ࠆ㧚ߎߎߢ࿑ 7㧘࿑ 9 ࠃࠅ㧘ᤨ㑆Ꮕ߇ 7.0 ⑽ߦ ߅ߌࠆ⥄Ꮖ⋧㑐ଥᢙࠍ᳞߼ࠆߣ㧘ߘࠇߙࠇ 0.2 એਅ ߢ޽ࠅ㧘ᤨ㑆Ꮕ߇ 1.0 ⑽㧘2.0 ⑽㧘4.0 ⑽ߩ႐วߣ߶ ߷หߓ୯ߢ޽ࠆ㧚 ᰴߦ㧘࿑ 13㧘࿑ 15 ߦ߅޿ߡ㧘ᤨ㑆Ꮕ߇ 7.0 ⑽ߦ ߅ߌࠆ⚥Ⓧ⏕₸ߩ 10㧑୯ࠍ᳞߼ࠆߣ㧘ߘࠇߙࠇᤨ㑆 Ꮕ߇ 2.0 ⑽㧘4.0 ⑽ߩ႐วߣ߶߷หߓ୯ߢ޽ࠆߎߣ ߇ಽ߆ࠆ㧚ߎߎߢ࿑ 8㧘࿑ 10 ࠃࠅ㧘ᤨ㑆Ꮕ߇ 7.0 ⑽ ߦ߅ߌࠆ⥄Ꮖ⋧㑐ଥᢙࠍ᳞߼ࠆߣ㧘ߘࠇߙࠇ 0.2㧘 0.1 ߢ޽ࠅ㧘ᤨ㑆Ꮕ߇ 2.0 ⑽㧘4.0 ⑽ߩ႐วߣ߶߷ห ߓ୯ߢ޽ࠆߎߣ߇ಽ߆ࠆ㧚ࠃߞߡ㧘⥄Ꮖ⋧㑐ଥᢙ߇ 0.2 એਅߦߥࠆᤨ㑆Ꮕࠍ᳞߼ࠇ߫㧘ߘࠇࠃࠅᄢ߈ߥ ᤨ㑆Ꮕߦ߅ߌࠆᄌേ࡟ࡌ࡞ࠍ᳞߼ࠆᔅⷐߪߥ޿ߎߣ ߇⏕⹺ߢ߈ߚ㧚 એ਄ࠃࠅ㧘⥄Ꮖ⋧㑐ଥᢙ߇ዊߐߊߥࠆߦߟࠇ㧘ᄌ േ࡟ࡌ࡞ߪᄢ߈ߊߥࠆߣ޿߁㑐ଥᕈࠍ᣿ࠄ߆ߦߒߚ㧚 ߹ߚ㧘ᄢ߈ߥᄌേ࡟ࡌ࡞ࠍ᛽಴ߔࠆߚ߼ߦ㧘⥄Ꮖ⋧ 㑐ଥᢙ߇ 0.2 એਅߦߥࠆᤨ㑆Ꮕࠍ᳞߼ࠆߎߣ߇᦭ല ߢ޽ࠆߎߣ߇ಽ߆ߞߚ㧚. 6.2. ࡅ࠻ᬌ⍮ᕈ⢻ߩᬌ⸛ ᧄࠪࠬ࠹ࡓߩࡅ࠻ᬌ⍮ᕈ⢻ࠍᬌ⸛ߔࠆߚ߼㧘ᬌ⍮ ⏕₸ࠍ᳞߼ߚ㧚ᧄ⎇ⓥߢߪ㧘ᬌ⍮⏕₸ࠍ´ࡅ࠻߇ቶౝ ߦ޿ࠆ⁁ᴫߢ㧘ࠨࡦࡊ࡝ࡦࠣᲤߦ߅޿ߡᄌേ࡟ࡌ࡞ ߇޽ࠆ㑣୯ࠍ⿥߃ࠆ⏕₸´ߣቯ⟵ߒߚ㧚߹ߚ㧘࿑ 12㧘 ࿑ 14 ࠃࠅ㧘ቶౝߦࡅ࠻߇޿ߥ޿႐วߦ߅޿ߡ㧘ᄌ േ࡟ࡌ࡞߇ 1 dB ࠍ⿥߃ߡ޿ߥ޿ߎߣ߇ࠊ߆ࠆ㧚ߒ ߚ߇ߞߡߎߎߢߪ㧘㑣୯ࠍࡅ࠻ߩ޿ߥ޿⁁ᴫߢᄌേ ࡟ࡌ࡞߇⿥߃ߥ޿୯ߣߒߡ㧘1 dB ߣ⸳ቯߒߚ㧚 ࿑ 16 ߦ㧘ฦ᷹ቯㇱደࠍࡅ࠻߇ 180 ⑽㑆࡜ࡦ࠳ࡓ ߦ⒖േߒߚ႐วߦ߅ߌࠆᄌേ࡟ࡌ࡞ߩታ㛎࠺࡯࠲ࠍ ၮߦ㧘ࡅ࠻ᬌ⍮⏕₸ࠍ᳞߼ߚ⚿ᨐࠍ␜ߔ㧚࿑ࠃࠅ㧘 TDD ࠍㆡ↪ߒߚ႐ว㧘ㇱደߩᐢߐߦ߆߆ࠊࠄߕ㧘ઁ ߣᲧセߒߡ⚂ 30 㧑ᬌ⍮⏕₸߇ᡷༀߔࠆߎߣ߇ಽ߆ ߞߚ㧚߹ߚ㧘᷹ቯㇱደԙߪ᷹ቯㇱደԘߣᲧセߒߡో ૕⊛ߦᬌ⍮⏕₸߇㜞޿ߎߣ߇ಽ߆ࠆ㧚ߎࠇߪ㧘᷹ቯ ㇱደԙߩᐢߐ߇᷹ቯㇱደԘߦᲧߴߡ⁜ߊ㧘ቶౝߩ㔚 ᵄ⚻〝ࠍࡅ࠻߇ࠃࠅ㗫❥ߦੂߒߚߎߣߦࠃࠅ㧘ᄌേ ࡟ࡌ࡞߇ᄢ߈ߊߥߞߚߎߣ߇ේ࿃ߣ⠨߃ࠄࠇࠆ㧚.

(6) 1. 1. TDD 7.0 sec 4.0 sec 2.0 sec 1.0 sec 0.5 sec. 0.1. Without Person. With Person. Cumulative Probability. Cumulative Probability. With Person. 0.01. TDD 1.0 sec. 0.1. Without Person. 0.01. TDD 1.0 sec. 0.001. 0.001 0. 1. 2. 3 4 5 Fluctuation Level [dB]. 6. 7. 0. 8. ࿑ 12㧦ᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸㧔2.0 [m/s]㧕 ᷹ቯㇱደԘ. 2. 4. 6. 8 10 12 14 16 Fluctuation Level [dB]. 18. 20. 22. ࿑ 14㧦ᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸㧔2.0 [m/s]㧕 ᷹ቯㇱደԙ. 1. 1. TDD 7.0 sec 4.0 sec 2.0 sec 1.0 sec 0.5 sec. 0.1. Cumulative Probability. Cumulative Probability. TDD 7.0 sec 4.0 sec 2.0 sec 1.0 sec 0.5 sec. 0.01. With Person. 0.001. TDD 7.0 sec 4.0 sec 2.0 sec 1.0 sec 0.5 sec. 0.1. 0.01. With Person. 0.001 0. . 1. 2. 3 4 5 Fluctuation Level [dB]. 6. 7. 8. 0. 2. 4. 6. 8 10 12 14 16 Fluctuation Level [dB]. 18. 20. 22. ࿑ 15㧦ᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸㧔0.5 [m/s]㧕 ᷹ቯㇱደԙ. ࿑ 13㧦ᄌേ࡟ࡌ࡞ߩ⚥Ⓧ⏕₸㧔0.5 [m/s]㧕 ᷹ቯㇱደԘ. 7.㩷䈍䉒䉍䈮. 0.5 [m/s] (᷹ቯㇱደԘ) 2.0 [m/s] (᷹ቯㇱደԘ) 0.5 [m/s] (᷹ቯㇱደԙ) 2.0 [m/s] (᷹ቯㇱደԙ). ᧄⓂߢߪ㧘UHF Ꮺ TV ฃାᵄࠍ↪޿㧘ደౝⅣႺߦ ߅޿ߡᔅὼ⊛ߦ↢ߓࠆࡑ࡞࠴ࡄࠬ߿ࠪࡖ࠼࠙ࠗࡦࠣ ߦࠃࠆฃା࡟ࡌ࡞ᄌേࠍ೑↪ߒߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓ ߦ㧘ᣂߚߦ TDD ࠍㆡ↪ߒ㧘ᬌ⍮⏕₸ߩᡷༀߦߟ޿ ߡᬌ⸛ࠍⴕߞߚ㧚ታ㛎ߩ⚿ᨐ㧘એਅߩߎߣࠍ᣿ࠄ߆ ߦߒߚ㧚 ࡮ ࡅ࠻ߩേ߈ߩㅦߐߦࠃߞߡ㧘ฃା࡟ࡌ࡞ߩᄌൻ ߇⇣ߥࠆߎߣࠍ⏕⹺ߒߚ㧚 ࡮ ࡅ࠻ߩ᭽‫ߥޘ‬ㅦߐߩേ߈ࠍ♖ᐲࠃߊᬌ⍮ߔࠆߚ ߼㧘⒖േㅦᐲ 2.0 [m/s]㧘0.5 [m/s]ߦ߅ߌࠆฃା ࡟ࡌ࡞ᄌേߩ⥄Ꮖ⋧㑐ଥᢙࠍ᳞߼ߚ㧚᳞߼ߚ⥄ Ꮖ⋧㑐ଥᢙࠍၮߦ㧘⒖േߔࠆㅦᐲߦᔕߓߡᄢ߈ ߥᄌേ࡟ࡌ࡞߇᛽಴ߢ߈ࠆ㧘ㆡಾߥᤨ㑆Ꮕࠍዉ ಴ߒߚ㧚 ࡮ ᳞߼ߚᤨ㑆Ꮕࠍ↪޿ߡ TDD ࠍㆡ↪ߔࠆߎߣߦ ࠃࠅ㧘ࡅ࠻ߩേ߈ߦࠃࠆฃା࡟ࡌ࡞ߩᄌേࠍ♖ ᐲࠃߊᬌ಴ߔࠆߎߣ߇ߢ߈ߚ㧚 ࡮ ⥄Ꮖ⋧㑐ଥᢙ߇ዊߐߊߥࠆߦߟࠇ㧘ᄌേ࡟ࡌ࡞ ߪᄢ߈ߊߥࠆߎߣ߇ಽ߆ߞߚ㧚߹ߚ㧘⥄Ꮖ⋧㑐 ଥᢙ߇ 0.2 એਅߦߥࠆᤨ㑆Ꮕࠍ᳞߼ࠆߎߣ߇᦭ ലߢ޽ࠆߎߣࠍ␜ߒߚ㧚 ࡮ TDD ࠍㆡ↪ߔࠆߎߣߢ㧘ㇱደߩᐢߐߦ߆߆ࠊࠄ ߕ㧘ᬌ⍮⏕₸߇⚂ 30 㧑ᡷༀߔࠆߎߣࠍ␜ߒߚ㧚 ੹ᓟߪ㧘ᧄឭ᩺ᣇᴺߩ৻⥸ᕈࠍ㜞߼ࠆߚ߼㧘 ᧚⾰ߩ ⇣ߥࠆቶౝⅣႺߢߩ᷹ቯ߿㧘ደᄖߩᄖㇱⷐ࿃㧔ደᄖ ߦሽ࿷ߔࠆࡅ࠻߿ゞ㧕ߦࠃࠆᓇ㗀ࠍᬌ⸛ߒ㧘ᬌ⍮⺋ Ꮕⷐ࿃ࠍ᣿ࠄ߆ߦߒߡ޿ߊߎߣ߇㊀ⷐߢ޽ࠆ㧚. Detection Probability [%]. 100 80 60 40 20 0 0.5. 1.0 2.0 4.0 Time Dif f erence [s]. TDD. ࿑ 16㧦ฦ᷹ቯㇱደߦ߅ߌࠆᬌ⍮⏕₸ߩᲧセ. ෳ⠨ᢥ₂ [1] ᩮᧄ ବ㓶㧘࠮ࡦࠨࠛ࡟ࠢ࠻ࡠ࠾ࠢࠬ㧘㔚ሶᖱႎㅢା ቇળ(1986) [2] ⷏ ᱜඳ㧘ศ↰ ᓆ㗼㧘ᷴ⟤ ᐘ㓶㧘㜞ᯅ ୃ㧘´᡼ㅍⲢ วဳࡕࡃࠗ࡞ⅣႺࠍᜰะߒߚ UHF Ꮺ㔚ᵄવ៝ࠛ࡝ ࠕߩᬌ⸛µ㧘ᖱႎಣℂቇળ⺰ᢥ⹹㧘Vol.45㧘No.12㧘 pp.2619-2629(2004) [3] M.Nishi㧘S.Takahashi㧘T.Yoshida㧘´Human Detection System Using UHF Band Terrestrial TV Receiving Wavesµ㧘2006 IEEEAPS㧘pp.3097-3100(2006) [4] ⷏ ᱜඳ㧘Ꮉญ ┙ᦶ㧘㜞ᯅ ⨃㧘ศ↰ ᓆ㗼㧘´UHF Ꮺ TV ᡼ㅍฃାᵄࠍ↪޿ߚࡅ࠻ᬌ⍮ࠪࠬ࠹ࡓߩឭ᩺µ㧘㔚 ሶ ᖱ ႎ ㅢ ା ቇ ⺰㧘 Vol.J89-B 㧘 No.9 㧘 pp.1789-1796(2006) [5] ർᎹ Ḯ྾㇢㧘ᤨ♽೉⸃ᨆ౉㐷㧘ጤᵄᦠᐫ(2005) [6] ㅴ჻ ᣽᣿㧘ή✢ㅢାߩ㔚ᵄવ៝㧘㔚ሶᖱႎႎㅢାቇ ળ(1992). −6−.

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