Siaina COFDM wireless video Transmitter mo e receiver fale ngaohiʻanga koloa ʻi Shenzhen

ʻE lava ʻe he OFDM ʻo fakaleleiʻi lelei ʻa e senolo ʻoku filifili ʻi he ʻatakai multipath, ka ʻoku molia atu ʻa e senolo (ʻoku, ʻa e molia atu ʻa ia ʻoku talangofua ai ʻa e amplitude ʻo e tokotaha fetuku koloa takitaha ki he tufakiʻanga naunau Rayleigh) kuo teʻeki ai ke ikunaʻi lelei. OFDM ʻoku ne fakaʻaongaʻi ʻa e senolo fakafaʻahinga ke fakaleleiʻi ʻaki ʻa e palopalema ko ʻeni ʻoku ui ko e COFDM (ʻOku ʻikai ke ʻi ai ha OFDM). Ko e tefitoʻi moʻoni mahuʻinga ke fakatahaʻi ʻa e tuʻo lahi ʻo e senolo ʻoku filifili (tuʻo lahi ʻo e kelekele) pea mo e senolo ʻoku ʻikai ke ʻi ai ha taimi (taimi ʻo e kelekele) fakataha ke faʻu ʻa e kelekele ʻo e taimi. ʻI he kelekele ko ʻeni, ʻOku vahevahe ʻa e fakaʻilonga ke modulated ʻaki ha kiʻi tuʻunga maʻolunga ʻo fakatatau ki ha ngaahi lao pau pea toki fakahaofi ʻi he taimi mo e tuʻo lahi. Pea ʻoku nau fehokotaki leva mo ha kouti convolutional, koeʻuhi ke fakasitetisitika tauʻataina ʻa e mole ʻa e fakaʻilonga ʻo e fakamatala. Kapau ʻoku faingataʻaʻia ʻa e fakaʻilonga ʻi ha mole ʻa e leʻo ʻi ha tokotaha fetuku koloa pau, fakasitetisitika lea, ʻe ʻasi mai ha vanavanaiki lelei ʻi ha tokotaha fetuku koloa ʻe taha, pea totongi huhuʻi mo kaniseli ʻe he ongo meʻa ni. Ko ia, ʻOku fakaleleiʻi ʻa e ngaue ki hono fakahoko ʻo e polokalama OFDM.

COFDM (tuʻo lahi hono fakaʻaongaʻi ʻo e ngaahi meʻa ʻoku fakaʻaongaʻi ʻi he fakafaʻahingá (orthogo), Ko hono fakanounouʻi ʻo e Vaʻa Orthogonal ʻo e vaʻa Multiplexing, ʻOku lolotonga hoko ia ko e tekinolosia modulation mo palomesi taha ʻi he mamani. Ko hono tefitoʻi moʻoni ke fakaului ʻa e fakamatala ʻoku vave ʻene hoko ki ha ngaahi founga iiki ʻoku maʻulalo ange hono feʻaveʻaki ʻo fakafou ʻi he ului ki he ngaahi meʻa ʻoku fai ki ai e feʻaveʻaki.

Ko hono fakafaʻahinga (F) ʻOku ʻuhinga ia ʻoku adopts ʻe he senolo ko ʻeni ha founga convolutional ʻoku ʻi ai ha ngaahi meʻa kehekehe ke feau ʻaki e ngaahi fie maʻu ki he maluʻi ʻo e fakamatala ʻoku mahuʻinga kehekehe; Orthogonal e vaʻa tuʻo lahi (OFD) ʻuhinga ki hono fakaʻaongaʻi ʻo ha tokolahi ʻo e kau fata (subcarriers), ʻa ia ʻoku tatau mo e tuʻo lahi ʻo e taimi ko ia ko ha mataʻifika lahi ʻo e ngaahi tefitoʻi oscillation; multiplexing ((M)) ʻOku ʻuhinga ia ʻoku ʻi ai ha ngaahi maʻuʻanga fakamatala lahi ʻoku interleaved pea tufaki ʻi he tokolahi ʻo e kau fata ʻi ʻolunga ke faʻu ha senolo.

1. ʻI he vaeuaʻanga malie ʻo e senituli kuo ʻosi, Naʻe fokotuʻu ʻe he kakai ha fokotuʻutuʻu ʻo e fetuʻutaki fakavahaʻa-taʻu mo e tuʻo lahi aliasing, fili ʻa e orthogonal ʻo e tokotaha fetuku koloa frequencies ko ha subcarriers, ʻa ia ko e meʻa ia ʻoku tau ui ko e COFDM. Ko ʻeni "orthogonality" ʻuhinga ki he va fetuʻutaki fakafika totonu ʻi he vahaʻa ʻo e tokotaha fetuku koloa frequencies. Fakatatau ki he fakakaukau ko ʻeni, ʻOku ʻikai ngata pe ʻi hono fakaʻaongaʻi kakato ʻe he COFDM ʻa e senolo bandwidth, kae fakaʻehiʻehi foki mei hono fakaʻaongaʻi ʻo e ngaahi fehalaaki ʻoku vave ʻene hoko mo e ngaahi fehalaaki ʻi he longoaʻa. Ko e COFDM ko ha fokotuʻutuʻu fetuʻutaki fakavahaʻa-taʻu makehe ia. Ko e fakamatala ʻoku tafe mai ʻe ha tokotaha ngaue ʻi he polokalama ko e serially/parallel ului ki ha ngaahi kouti ʻoku ʻikai fuʻu maʻulalo, pea ʻoku ʻave ʻa e kouti takitaha mo ha subcarrier. ʻOua ʻe fakaʻaongaʻi ʻa e ngaahi meʻasivi bandpass ke fakamavaheʻi ʻaki ʻa e subcarriers, ʻOku fakaʻaongaʻi ʻe he COFDM ʻa e ʻaukai Fourier liliu (FFT) ke fili ʻa e waveforms ʻoku kei orthogonal neongo aliasing.
2. ʻOku kau ʻa e tekinolosia COFDM ki he modulation fakavahaʻa-taʻu (Modulation fakavahaʻa-taʻu, MCM) tekinolosia. ʻOku tuifio ʻe ha ngaahi fakamatala fakapepa ʻe niʻihi ʻa e OFDM mo e MCM, ʻa ia ʻoku ʻikai ke faingataʻa feʻunga. ʻOku angamaheni ʻaki hono fakaʻaongaʻi ʻa e MCM mo e COFDM ʻi he ngaahi senolo wireless. Ko e faikehekehe ʻiate kinautolu ko e ʻuhinga ʻo e tekinolosia COFDM ki hono vahevahe ʻo ha senolo ki orthogonal ngaahi senolo iiki, ʻa ia ʻoku ʻi ai ha senolo maʻolunga fakaʻaongaʻi vave; neongo ʻe lava ke hoko ʻa e MCM ko ha ngaahi founga lahi ange ʻo e senolo.
3. Ko hono fakafeʻiloaki ʻo e tekinolosia COFDM ke fakaleleiʻi ʻa e tuʻunga fakaʻaongaʻi ʻo e tokotaha fetuku koloa, pe ke fakaleleiʻi ʻa e modulation ʻo e kau fata fakavahaʻa-taʻu. Ko hono ʻulungaanga ko e orthogonal ʻa e tokotaha fetuku iiki takitaha, koeʻuhi ke lava ʻo fehulunaki ʻa e tuʻunga ʻoku ʻi ai hili hono fakamafola modulation, fakasiʻisiʻi ai e kaunoa ʻa e Mutuale ʻi he vahaʻa ʻo e subcarriers. ʻE lava ke kehekehe ʻa e founga modulation ʻoku fakaʻaongaʻi ʻe he tokotaha fetuku COFDM takitaha. ʻE lava ke fili ʻe he tokotaha fetuku koloa takitaha ha ngaahi founga modulation kehekehe ʻo fakatatau ki he ngaahi tuʻunga kehekehe ʻo e senolo, hange ko e BPSK, QPSK, 8PSK, 16QAM, 64QAM, mo e ha fua., makatuʻunga ʻi he tefitoʻi moʻoni ʻo e palanisi lelei taha ʻi he vahaʻa ʻo e fakaʻaongaʻi mo e vave ʻo e fehalaaki. ʻOku fakaʻaongaʻi ʻe he tekinolosia COFDM ʻa e adaptive modulation, pea fili ha ngaahi founga modulation kehekehe ʻo fakatatau ki he tuʻunga lelei ʻo e senolo. COFDM toe adopts foki ʻa e founga ngaue fakafekauʻaki ʻo e mapuleʻi ʻo e malohi mo adaptive modulation. ʻI he taimi ʻoku lelei ai e senolo, ʻOku kei liliu pe ʻa e malohi ʻo e feʻaveʻaki, pea mo e founga modulation (hange ko e 64QAM) ʻe lava ke fakalahi, pe ʻe lava ke fakasiʻisiʻi ʻa e malohi ʻo e feʻaveʻaki ʻi he taimi ʻoku maʻulalo ai ʻa e founga modulation (hange ko QPSK).
4. Ko e tekinolosia COFDM ko e fakavaʻe ia ʻo e HPA felotoihe (HomePlug Powerline felotoihe) fakapapauʻi ʻo e ngaahi meʻa faka. ʻOku ne fakaʻaongaʻi ha tekinolosia fakavahaʻa-taʻu ke fakatahaʻi ʻaki ha ngaahi fakaʻilonga lahi ʻi he frequencies kehekehe ʻoku ui ko e kau fata ki ha fakaʻilonga pe ʻe taha ke fakakakato ʻaki e fakaʻilonga. Koeʻuhi ʻoku malava ʻe he tekinolosia ko ʻeni ʻo ʻave ʻa e ngaahi fakaʻilonga ʻi he kaunoa, ʻOku faʻa fakaʻaongaʻi ia ʻi he mītia feʻaveʻakí ʻa ia ʻoku tuʻu laveangofua ki ha kaunoa mei tuʻa pe maʻu ha poto ke tekeʻi ʻaki ha kaunoa mei tuʻa.
5. Ko e COFDM ko e fakanounou ia ʻo e vaʻa Orthogonal ʻo e vaʻa Multiplexing, ʻa ia ko e tekinolosia fakalakalaka mo palomesi taha modulation taha ia ʻi he mamani. ʻOku maʻu hono mahuʻinga ʻi hono poupouʻi ʻo e ngaahi polokalama ʻoku maumau ʻi he fakangatangata ʻo e laine ʻo e vakai. Ko ha tekinolosia ia ʻoku ne fakaʻaongaʻi kakato ʻa e ngaahi maʻuʻanga tokoni ʻi he letioo pea ʻoku ne maʻu ha ngaahi totongi lelei ki he longoaʻa mo e kaunoa. Ko e Diffraction mo e kemikale ʻo e ngaahi meʻa ʻoku ne fakapuliki ʻa e ngaahi tekinolosia COFDM. uho. Ko hono tefitoʻi moʻoni ke fakaului ʻa e fakamatala ʻoku vave ʻene hoko ki ha ngaahi founga iiki ʻoku maʻulalo ange hono feʻaveʻaki ʻo fakafou ʻi he ului ki he ngaahi meʻa ʻoku fai ki ai e feʻaveʻaki.
6. ʻE lava ʻe he tekinolosia COFDM ʻo fakamavahevaheʻi ha ngaahi fakaʻilonga fakaʻilekitulonika lahi pea ʻe lava ke ngaue lelei ʻi he ngaahi fakaʻilonga ʻoku ne fakafeʻatungiaʻi. ʻOku tupu ia mei he fakaʻilonga makehe ko ʻeni "malava ke fakaʻaongaʻi" ʻOku ʻofaʻi mo talitali lelei ʻa e tekinolosia COFDM ʻe he ngaahi meʻangaue fetuʻutaki. ʻE lava ke hokohoko atu hono vakaiʻi ʻe he tekinolosia COFDM ʻa e liliu fakafokifa ʻo e ngaahi ʻulungaanga ʻo e fetuʻutaki ʻi he founga feʻaveʻaki. ʻE liliu ʻa e malava ko ia ʻe he hala fetuʻutaki ki hono ʻave ʻo e fakamatala ʻi he taimi. ʻE lava KE COFDM dynamically liliu ki ai, pea fetongi ʻa e tokotaha fetuku koloa ʻoku fekauʻaki mo ia ke fakapapauʻi ʻoku hokohoko atu ʻa e fakalakalaka. ongoongo lelei. ʻOku matuʻaki feʻunga ʻa e tekinolosia COFDM ke fakaʻaongaʻi ʻi he ngaahi fale ʻoku maʻolunga, densely nofoʻi mo e ngaahi feituʻu ʻiloa fakasiokalafi, ngaahi feituʻu ʻoku mafola ai e ngaahi fakaʻilonga, mo e ngaahi feituʻu ʻoku ʻave ki ai e fakamatala ʻoku vavé.

1. ʻE lava foki ke ʻave ha fakamatala lahi ʻi he bandwidth fasiʻi: ʻE lava ke mavahevahe ʻa e tekinolosia COFDM 1000 ngaahi fakaʻilonga fakaʻilekitulonika ʻi he taimi tatau, pea ʻe hanga ʻe he malava ko ia ke ngaue lelei ʻi he ngaahi fakaʻilonga ʻoku ne fakafeʻatungiaʻi ʻa e tekinolosia ʻo e FINEʻEIKI ʻa ia kuo manakoa ʻi he maketi he ʻaho ni. Ko e akenga ʻo e fakalakalaka mo e tupulaki ʻoku makatuʻunga ia ʻi he fakaʻilonga makehe ko ʻeni "malava ke fakaʻaongaʻi" ʻOku ne ʻai ke manakoa mo manakoa ʻa e tekinolosia COFDM ʻi he ngaahi fetuʻutaki ʻi ʻIulope mo e telefoni toʻotoʻo, hange ko Kalefonia Cisco systems, Niu ʻIoke Flarion ʻinisititiuti ʻo e tekinolosia mo e ʻinisititiuti ʻo e tekinolosia mo e niʻihi kehe kuo kamata ke nau fakaʻaongaʻi ʻa e tekinolosia ko ʻeni, pea kuo kamata foki ke fakaʻaongaʻi ʻe he ʻinisititiuti Wi-LAN ʻo Kanata ʻa e tekinolosia ko ʻeni.
2. ʻE lava ke hokohoko atu hono vakaiʻi ʻe he tekinolosia COFDM ʻa e liliu fakafokifa ʻo e ngaahi ʻulungaanga ʻo e fetuʻutaki ʻi he founga feʻaveʻaki: Koeʻuhi ʻe liliu ʻa e malava ko ia ʻe he hala fetuʻutaki ke ʻave ʻa e fakamatala ʻi ha vahaʻataimi, ʻE lava KE COFDM dynamically liliu ki ai pea fetongi ʻa e tokotaha fetuku koloa ke fakapapauʻi ʻoku hokohoko atu ʻa e ngaahi fetuʻutaki lelei;
3. ʻE lava ke ʻiloʻi ʻe he tekinolosia ko ʻeni ʻa e meʻa pau ʻoku ʻi ai ha fakaʻilonga maʻolunga attenuation pe kaunoa ʻi he malumalu ʻo e feʻaveʻaki, pea fai leva ha ngaahi founga modulation feʻunga ke lava ai ʻa e tokotaha fetuku koloa ʻi he tuʻo lahi ʻo e fetuʻutaki ke ola lelei;
4. ʻOku matuʻaki feʻunga ʻa e tekinolosia COFDM ke fakaʻaongaʻi ʻi he ngaahi fale ʻoku maʻolunga, densely nofoʻi mo e ngaahi feituʻu ʻiloa fakasiokalafi, mo e ngaahi feituʻu ʻoku mafola ai e ngaahi fakaʻilongá. ʻOku fakatou ʻomi ʻe he fakamatala ʻoku vave hono feʻaveʻaki mo e leʻo fakaʻilekitulonika ʻa e ʻamanaki lelei ke fakasiʻisiʻi ʻa e ola ʻo e ngaahi ola multipath ʻi he ngaahi fakaʻilonga.
5. Te ne lava ʻo fakafepakiʻi lelei ʻa e kaunoa ʻi he vahaʻa ʻo e fakaʻilonga waveforms, pea ʻoku feʻunga ia mo hono feʻaveʻaki ʻo e fakamatala ʻoku vave hono feʻaveʻaki ʻi he ngaahi ʻatakai multipath mo e ngaahi senolo ʻoku molia. ʻI he taimi ʻoku hoko ai e mole ʻa e ngaahi meʻa ʻoku filifili koeʻuhi ko e multipath feʻaveʻaki ʻi he senolo, Ko e subcarriers pe ʻoku to ʻi he tuʻo lahi ʻo e loto mafasia mo e fakamatala ʻoku ʻave ʻe kinautolu ʻoku uesia, pea ʻoku ʻikai maumau ʻa e ngaahi subcarriers kehe, ko ia ʻoku lelei ange ʻa e lahi ʻo e fehalaaki ʻi hono fakahoko ʻo e polokalama.
6. ʻI he fakafaʻahinga ʻo e subcarrier takitaha, ʻOku ne maʻu ha ivi malohi ke fakafepakiʻi. Kuo ʻosi fakaʻaongaʻi ʻe he tekinolosia COFDM ʻa e kehekehe ʻo e senolo, Kapau ʻoku ʻikai fuʻu mamafa ʻa e mole, ʻOku ʻikai fie maʻu ke tanaki atu ha taimi equalizer. ʻI he e encoding ʻa e senolo takitaha, ʻe lava ke fakaleleiʻi e ngāue ʻa e polokalamá.
7. ʻOku matuʻuaki lahi ʻe he tekinolosia COFDM ʻa e narrowband kaunoa, koeʻuhi he ʻoku uesia pe ʻe he ngaahi kaunoa ko ʻeni ha konga siʻi ʻo e ngaahi senolo iiki.
8. ʻE lava ke fili ʻa e founga hono fakahoko ʻo e OFDM ʻo makatuʻunga ʻi he IFFT/FT;
9. ʻOku fuʻu maʻolunga ʻaupito ʻa e senolo fakaʻaongaʻi, ʻa ia ʻoku matuʻaki mahuʻinga ʻi he ʻatakai wireless mo e ngaahi maʻuʻanga tokoni fakangatangata; ʻi he taimi ʻoku lahi ai e tokolahi ʻo e kau fata iiki, ʻOku fakahehema ʻa e fakaʻaongaʻi ʻo e polokalama ke 2Baud/Hz.
10. ʻOku maʻu ʻe hono fakaʻaongaʻi ʻo e tekinolosia COFDM ʻi he wireless Image ʻa e ngaahi lelei makehe ko ʻeni:
11. Fakaʻaongaʻi ʻi he ngaahi ʻatakai ʻoku ʻikai ke ʻasi mo fakafeʻatungiaʻi, ʻa e fakaʻofoʻofa "diffraction" mo e "kemikale" ʻOku hanga ʻe he ngaahi meʻa ʻoku malava ʻo ʻai ke feʻunga mo e ʻimisi ʻo e wireless ʻi he ngaahi feituʻu ʻi he feituʻu, kauʻafonua, mo e ngaahi falé. Kuo pau ke ʻasi ʻa e meʻangaue microwave angamaheni ʻi he ngaahi tuʻunga ʻoku ʻasi mai. (Kuo pau ke ʻoua naʻa ʻi ai ha fakapuliki ʻi he vahaʻa ʻo e ongo meʻa ni mo hono maʻu ʻo e ngaahi poini) ke fokotuʻu ha fehokotakiʻanga wireless Channel, ko ia ʻoku fakangatangata lahi hono fakaʻaongaʻi ʻe he ʻatakai. ʻOku fie maʻu ke siviʻi kimuʻa e ʻatakai ʻo e tohi kole, fili pea siviʻi hono ʻave mo hono maʻu ʻo e ngaahi poini, liliu e huʻunga ʻo e ʻenitena, pea fikaʻi ʻa e maʻolunga ʻo e ʻenitena, mo e ha fua. , ʻOku mamafa mo ngali kehe mole ʻa e ngaue, ʻa ia ʻoku ʻikai ngata pe ʻi heʻene taʻofi fakahangatonu ʻa e feʻaveʻaki mo hono maʻu ʻo e ongo mo e vitioo, ka ʻoku ne fakasiʻisiʻi foki ʻa e ala falalaʻanga mo e ngaue lelei ʻa e polokalama.
    Kuo liliu fakaʻaufuli ʻe COFDM meʻangaue wireless ʻa e tukunga ko ʻeni. Koeʻuhi ko hono ngaahi ʻulungaanga fakatekinikale hange ko e tokotaha fetuku koloa fakavahaʻa-taʻu, ʻOku maʻu ʻe he meʻangaue COFDM ʻa e ngaahi lelei ʻo e "ʻikai ke ʻi ai ha laine" mo e "diffraction" ʻave (transmission). ʻIloʻi ʻa e feʻaveʻaki ʻo e ngaahi ʻimisi, ʻikai uesia ʻe he ʻatakai pe uesia ʻe he ʻatakai. ʻOku adopts ʻe he polokalama ha omnidirectional ʻenitena, ʻa ia te ne lava ʻo fokotuʻu ha fehokotakiʻanga wireless ʻi he taimi nounou taha. ʻE lava foki ke ngaʻunu tauʻataina ʻa e ngataʻanga mo e ngataʻanga ʻo ʻikai fakangatangata ʻe he fakahinohino. ʻOku faingofua pē ʻa e polokalamá, falalaʻanga, mo feliliuaki hono fakaʻaongaʻí.
12. ʻOku feʻunga ia mo hono feʻaveʻaki ʻo e ngaahi ʻata moʻoni ʻi he ngaue vave, pea lava ke fakaʻaongaʻi microwave (naunau fakaʻilekitulonika microwave, mafola ʻa e tuʻunga microwave) mo e meʻangaue wireless LAN ʻi he platforms hange ko e ngaahi meʻalele, vaka, mo e helikopeta. Koeʻuhi ko e ngaahi ʻuhinga fakatekinikale ʻo e polokalama, he ʻikai lava ke fakatokangaʻi tauʻataina ʻa e maʻu ʻo e fale mate pea mo hono maʻu ʻo e ngaahi ʻata ʻi he taimi moʻoni lolotonga e ngaue vave. ʻI he taimi ʻoku fakaʻaongaʻi ai ʻa e microwave mo e wireless LAN meʻangaue ʻi he ngaahi meʻalele mo e vaka ki hono feʻaveʻaki ʻo e ʻimisi wireless, Ko e founga angamaheni ke configure ha toe "servo stabilization" meʻangaue ke fakaleleiʻi ʻaki e ngaahi palopalema hange ko electromagnetic fakataukeiʻi ʻo e peau, muimuiʻi, mo e stabilization, ka ʻe toki lava pe ke fakaʻaongaʻi ia ʻi ha ngaahi tukunga pau. ʻIloʻi ʻa e feʻaveʻaki ʻo e poini toʻotoʻo ke tuʻu maʻu ʻi he malumalu ʻo e ʻatakai, pea ʻoku faʻa uesia ʻa e ʻimisi, ʻa ia ʻoku ne uesia lahi ʻa e ola ʻo e feʻaveʻaki mo e maʻu. ʻOku faingataʻa ʻa e ʻenisinia, ʻOku fakasiʻisiʻi ʻa e ala falalaʻanga, pea ʻoku fuʻu maʻolunga ʻaupito ʻa e totongi.
    Ka ki he meʻangaue COFDM, ʻoku ʻikai fie maʻu ki ai ha toe ngaahi meʻangaue kehe, pea ʻe lava ke fakaʻaongaʻi ia ʻi he vahaʻa ʻo e telefoni toʻotoʻo, telefoni toʻotoʻo, pea ʻoku feʻunga ʻaupito ke fola ʻi he ngaahi platforms toʻotoʻo hange ko e ngaahi meʻalele, vaka, mo e helikopeta. ʻOku ʻikai ngata pe ʻi he falalaʻanga ʻa e feʻaveʻaki, ka ʻoku ne toe fakahaaʻi foki ʻa e ngaue totongi maʻolunga.
13. ʻOku maʻolunga ʻa e bandwidth feʻaveʻaki, ʻa ia ʻoku feʻunga mo e tuʻunga maʻolunga mo e ʻimisi maʻolunga ʻo e ongo mo e vitioo. ʻE lava ke lahi ange ʻa e vave ʻo e ʻimisi ʻi he 4M bPS. ʻI he naunau fakaʻilekitulonika fakalukufua microwave mo e mafola ʻa e ngaahi fehokotakiʻanga microwave feʻaveʻaki, Neongo ʻoku fakaʻaongaʻi ʻa e MPEG-2 e encoding, ʻa e senolo adopts 2M mahalo vave, hange ko e E1, koeʻuhi ke lava ʻo aʻu ʻa e fakaleleiʻi ʻo e ʻimisi ki he 720×576, ka ko e ʻimisi ʻo e kouti kuo fakasiʻisiʻi ko e 1M toʻohema mo e toʻomataʻu, ʻikai lava ke feau e ngaahi fie maʻu pau ʻo e maʻu ʻo e fakamatala ki hono ʻanalaiso ʻo e ongo mo e vitioo, tukuʻanga meʻatokoní, mo fakatonutonu.
    ʻE lava ke fili ʻe he subcarrier takitaha ʻo e tekinolosia COFDM ha modulation vave hange ko QPSK, 16QAM, 64QAM, mo e ha fua., pea ʻoku lahi ange ʻa e vave ʻo e senolo ʻi he 4M bPS. Ko ia, ngaahi ʻata lelei ʻo hange ko e 4:2:0 mo e 4:2:2 ʻi he MPEG-2 ʻe lava ke ʻave, ʻe lava ke aʻu ʻa e ʻimisi ʻo e fakaleleiʻi ʻo e ngataʻanga ki he 720×576 pe 720×480, pea ʻe lava ke ʻi he 6M ʻa e kouti stream. ʻOku ofi ʻa e ʻimisi ki he tuʻunga ʻo e DVD, ʻa ia te ne lava ʻo feau kakato ʻa e ngaahi fie maʻu pau ʻo e maʻu ʻo e ngataʻanga ki hono ʻanalaiso ʻo e ongo mo e vitioo, tukuʻanga meʻatokoní, mo fakatonutonu.
14. ʻI ha ʻatakai electromagnetic faingataʻa, ʻOku maʻu ʻe he COFDM ha ngaue lelei ʻaupito ki hono fakafepakiʻi ʻo e ngaahi meʻa ʻoku ʻikai ke fuʻu lelei pe ko e kaunoa ʻa e kau tameʻa mo e kaunoa ʻi he vahaʻa ʻo e fakaʻilonga waveforms. ʻI he fakafaʻahinga ʻo e ngaahi meʻa iiki takitaha, ʻOku ne maʻu ha ivi malohi ke fakafepakiʻi. ʻI he polokalama fetuku koloa pe ʻe taha (hange ko e naunau fakaʻilekitulonika microwave, mafola ʻa e microwave, mo e ha fua.), ʻe lava ʻe ha foʻi molia pe kaunoa ʻe taha ʻo fakatupu ʻa e fehokotakiʻanga fetuʻutaki kotoa ke taʻe-malava, ka ʻi ha polokalama COFDM fakavahaʻa-taʻu, Ko ha konga siʻi pe ʻo e kau fata iiki ʻe interfered, pea mo e ngaahi meʻa iiki ko ʻeni ʻe lava foki ke fakaʻaongaʻi ʻe he senolo ʻa e ngaahi kouti fakatonutonu ʻo e fehalaaki ki he fakatonutonu ʻo e fehalaaki ke fakapapauʻi ʻoku ʻi ai ha kiʻi fehalaaki siʻisiʻi ki hono feʻaveʻaki.

Fakaʻaongaʻi ʻo e COFDM wireless fakatekinolosia ʻi he vitioo Wilder
ʻOku fokotuʻutuʻu ʻe he ʻimisi ʻo e wireless ʻa hono fakaʻaongaʻi ʻo e tekinolosia COFDM ʻoku ʻikai lelei hono feʻaveʻaki mo e ngaue toʻotoʻo ʻoku vave hono feʻaveʻaki, pea ʻe lava ke ne ʻomi ha ngaahi ʻata mo ha ngaahi ongo moʻoni ʻo e DVD. ʻE lava ke ʻave ʻa e ongo mo e vitioo ʻi he saiti flexibly pea vave ʻene fakafou ʻi he meʻalele pe meʻangaue ʻoku toʻotoʻo holo pe toʻotoʻo holo pe ʻave ki he Senita pule ʻo fakafou ʻi ha tauʻanga lelue, netiueka ʻi he filo, mo e ha fua. ʻE lava ke fokotuʻu ʻe he meʻangaue ha ngaahi fehokotakiʻanga mamaʻo mo ha microwave kehe, satelaite, mo e meʻangaue ki he fetuʻutaki ʻi he filo ke faʻu ʻaki ha founga feʻaveʻaki ʻo e ʻimisi. Ko e tefitoʻi ʻatakai ʻo e ngaahi meʻangaue ki hono feʻaveʻaki ʻo e ʻimisi ʻo e COFDM fakatekinolosia ko e: ʻatakai ʻoku taʻofi ai e fale, ʻi he vahaʻa ʻo e ngaahi falé, ʻi loto mo tuʻa ʻi he ngaahi fale, ʻi he vahaʻa ʻo lalofonua mo e kelekele ʻo e ngaahi fale; fakaʻaongaʻi ʻi he telefoni toʻotoʻ; ʻimisi ʻo e tahi, aerial e ʻimisi ʻo e ʻimisi, mo e ha fua. Ko ha ʻimisi wireless ia ʻoku fie maʻu fakavavevave ʻe he maluʻi ʻa e kakai ʻi ʻapi, kau taú, kau polisi kuo ʻosi fakamahafu, maluʻi mei he afí, maluʻi ʻo e ʻea fakapuleʻanga (maluʻi fakapuleʻangá), ʻoku ʻikai ke ʻi ai ha vai, vaka tahi ne ngaahi meʻa, ngaahi ʻulungāanga fakafonuá, letioo mo e televisone mo e ngaahi ngaueʻanga kehe ʻi he malu, fekau ki he malaʻe, misiona reconnaissance, fakahaofi ʻo e fakatamaki, fakamafola hangatonu mo e ngaahi ngaue kehe ʻoku feʻaveʻaki.

hanhsx wireless ʻimisi ʻo e founga vakaiʻi ʻo e taimi moʻoni adopts COFDM tekinolosia, ʻa ia te ne lava ʻo fakapapauʻi ʻa e feʻaveʻaki mo hono vakaiʻi ʻo e taimi moʻoni ʻi he ngaʻunu vave, fakafepaki ki he ngaahi meʻa ʻoku ne fakafepakiʻi mo e kaunoa ʻi he hala fakavahaʻa-taʻu (ʻe lava ke aʻu e vave ʻo e ngaʻunu 150 km/h), pea ʻomi ha ʻimisi lelei ʻo e fakamafola ʻi he tuʻunga maʻolunga ʻo e fakamafola, malohi ʻoku ʻikai ke ʻi ai ha meʻa ʻe malava ke feʻaveʻaki, lelei ki hono fakaʻaongaʻi ʻo e ʻatakai ʻoku ʻiloa ko e faingataʻa ʻaupito "ngaahi fetuʻutaki ʻi he teleʻá", ʻikai ha fakataukei ʻenitena. ʻOku maʻu ʻe he koloa ʻa e ngaahi ʻulungaanga ko ʻeni: feʻaveʻaki fakaʻilekitulōnika ʻo e ongó, feʻaveʻaki ʻo e ʻimisi moʻoni, kiʻi tohi siʻisiʻi ʻo e maʻu mo e transmitter, fefonongaʻaki malohi, feliliuaki mo faingofua, ʻe lava ke fakaʻaongaʻi nima pē, founga feʻaveʻaki, tuʻunga ʻikai fakahahaholo, pea ʻe lava ke aʻu ʻa e fehokotakiʻanga ki he mamaʻo ʻo e 10KM-50KM.

ʻOku fakaʻaongaʻi lahi ʻa e koloa ʻi he maluʻi ʻa e kakai, maluʻi mei he afí, kau polisi ʻoku feʻaluʻaki, maluʻi ʻo e ʻea fakapuleʻanga, kau polisi ʻi he feituʻu ʻoku nau tokangaʻi e lao, vakaiʻi ʻo e maluʻi ʻo e ʻatakai, meʻa fakatuʻupakeé, conservancy vai mo hono puleʻi ʻo e tafea, meʻa fakatuʻupake ki he malohi fakaʻuhila, meʻa fakatuʻupake ʻi he le, vaka tahi ne e kau polisi, sivi surveillance tahi, maluʻi ʻo e kauʻafonua fakafonua, uafu vakaiʻi, fakaʻehiʻehi mei he vao ʻakau, malaʻe ʻo e lolo ʻoku ne fakafepakiʻi e kaihaʻa , reconnaissance fakakautau mo e ngaahi feituʻu kehe, feʻunga mo e feʻaveʻaki toʻotoʻo mo hono vakaiʻi ʻo e ngaahi ʻata lelei ʻi he ngaahi ʻatakai faingataʻa kehekehe hange ko e ngaahi feituʻu ʻi he feituʻu, ngaahi tahí, mo e ngaahi moʻungá.