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5 Fa'amanuiaga ole COFDM Tekonolosi ile Fa'asalalau Vitio Uaea

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Fa'apuupuuga: O lenei blog e masani lava ona faʻaalia uiga faʻaoga ma le lelei o le COFDM tekonolosi i le faʻasalalauga faʻasalalau, ma vaega faʻaoga o tekinolosi.

Keywords: le laina-o-vaaiga;Anti-faalavelave;Alu ile saoasaoa maualuga;COFDM

1. O a fa'atekonolosi feso'ota'iga fa'asalalau masani?

O le faiga fa'atekinisi fa'aogaina i le fa'asalalauga e mafai ona vaevaeina fa'atasi i fa'asalalauga analog, fa'asalalauga fa'amatalaga/leitio Initaneti, GSM / GPRS CDMA, microwave numera (tele lava fa'asalalau alaleo microwave), WLAN (le feso'otaiga vavave), COFDM (fa'asologa fa'asolosolo fa'asolosolo), ma isi. I totonu oi latou, e le mafai e tekinolosi faʻaleaganuʻu ona ausia le televave o fesoʻotaiga vavave faʻasalalau i lalo o le "poloka, e le o vaʻaia ma le maualuga-saosaoa tulaga feaveaʻi", faʻatasi ai ma le atinaʻeina ma le matua o tekinolosi OFDM, o lenei faʻafitauli o loʻo i ai se fofo.

 

2. O le a le COFDM tekinolosi?

COFDM (coded orthogonal frequency division multiplexing), o lona uiga, coding orthogonal frequency division multiplexing, faʻaopoopo i le mamana coding faʻasaʻoina galuega, o le pito sili ona taua o le tele-carrier modulation, lea e vaevaeina ai se alalaupapa tuʻufaʻatasia i le tele o laina pito i lalo o le orthogonal i le fa'asologa masani, fa'aaogaina se subcarrier e tasi i so'o-auala ta'itasi, ma decomposes le data streams i le tele o sub-data streams, decomposing the data flow rate, o nei sub-data streams e fa'aaogaina e fa'aogaina ta'itasi subcarrier eseese.

 

O le felauaiga tutusa o subcarrier ta'itasi e fa'aitiitia ai le fa'alagolago i se va'ava'a e tasi, ma lona malosi e fa'afefete ai le tele, fa'alavelave fa'alavelave (ISI), ma le malosi o le Doppler frequency shift e fa'aleleia atili.

 

O le faʻaogaina o tekinolosi COFDM e mafai ona iloa moni ai le faʻaogaina o fesoʻotaʻiga televave i lalo o le faʻalavelave, tulaga e le o vaʻaia ma maualuga le saoasaoa, lea o loʻo i ai nei le tekonolosi faʻaogaina sili ona maualuga ma sili ona folafola i le lalolagi.

3. O le a le lelei o le COFDM tekonolosi i le faʻasalalauga faʻasalalau?

O feso'ota'iga uaealesi e alu i ni vaega se lua: fa'asalalauga analog ma fa'afuainumera.O le fa'aliliuina o ata fa'atusa ua matua fa'ate'aina i le tele o alamanuia ona o lona fa'alavelave ma fa'alavelave fa'atasi ma le fa'aogaina o le pisa, ma i'u ai i le leaga o le a'afiaga i fa'aoga fa'atino.

Faatasi ai ma le matua o le OFDM tekinolosi ma vaega, o oloa e faaaoga COFDM tekinolosi ua avea ma masini feaveai uaealesi sili ona maualuga.O ona fa'amanuiaga e fa'apea:

1、E talafeagai mo le faʻaogaina i le leai o se laina-o-vaʻaiga ma faʻalavelave faʻalavelave e pei o taulaga, taulaga, ma fale, ma faʻaalia lelei le "faʻasalalau ma le ulu" gafatia.

COFDM masini ata uaealesi o loʻo i ai le lelei o le "le-laina-o-vaaiga" ma le "eseesega" felauaiga ona o lona tele-aveina ma isi uiga faʻapitoa , I totonu o taulaga, mauga, totonu ma fafo fale ma isi siosiomaga e le mafai ona vaʻaia. ma faʻalavelaveina, e mafai e le masini ona ausia le faʻasalalau mautu o ata ma se avanoa maualuga, ma e le afaina i le siosiomaga pe itiiti le afaina i le siosiomaga.

Omnidirectional antennas e masani ona faʻaaogaina i pito uma e lua o le transceiver ma le taliaina, ma o le faʻaogaina o le faiga e faigofie, faʻalagolago, ma fetuutuunai.

 

2、E talafeagai mo le televave feaveaʻi feaveaʻi, ma e mafai ona faʻaoga i taavale, vaʻa, helikopa / drones ma isi faʻavae.

O microwave masani, LAN uaealesi ma isi masini e le mafai ona tutoʻatasi le faʻaogaina o le telefoni feaveaʻi o le transceiver end ma e mafai ona naʻo le faʻaogaina o le telefoni feaveaʻi i le tulaga tumau i lalo o nisi tulaga.O lona faiga e tele feso'ota'iga fa'apitoa, fa'ainisinia lavelave, fa'aitiitia le fa'atuatuaina, ma le tau maualuga tele.

Ae ui i lea, mo meafaigaluega COFDM, e le manaʻomia ni masini faʻaopoopo, e mafai ona iloa le faʻaogaina o le telefoni feaveaʻi, potu feʻaveaʻi, ma e fetaui lelei mo le faʻapipiʻiina i luga o masini feaveaʻi e pei o taavale, vaʻa, helicopters / drones, ma isi. O le faʻasalalauga e maualuga le faʻatuatuaina ma le maualuga o le tau.

 

3、E fetaui lelei mo le televave o faʻamatalaga faʻamatalaga, e masani ona sili atu nai lo le 4Mbps, e faʻafeiloaʻi ai le tuʻuina atu o ata maualuga ma leo.

I le faʻaopoopoga i manaʻoga mo mea pueata, o ata maualuga ma leo e maualuga tele manaʻoga mo le faʻavasegaina o vaitafe ma fua faʻatatau, ma o subcarrier taʻitasi o le COFDM tekinolosi e mafai ona filifili QPSK, 16QAM, 64QAM ma isi suiga maualuga-saosaoa, ma le synthesized channel fua faatatau. e masani ona sili atu nai lo le 4Mbps.O le mea lea, e mafai ona tuʻuina atu le 4: 2: 0, 4: 2: 2 ma isi codecs maualuga i MPEG2, ma o le faʻataʻitaʻiga ata o le faʻaiʻuga e mafai ona oʻo atu i le 1080P, lea e fetaui ma manaʻoga o le maeʻa suʻesuʻega, teuina, faʻasaʻo ma faapena foi.

 

4、I siosiomaga electromagnetic lavelave, COFDM o loʻo i ai le puipuiga sili ona lelei e faʻalavelave.

I totonu o se tasi-carrier system, o se tasi e mou atu poʻo se faʻalavelave e mafai ona mafua ai ona le manuia le fesoʻotaʻiga fesoʻotaʻiga atoa, ae i totonu o le multicarrier COFDM system, e naʻo sina pasene laʻititi o subcarriers e faʻalavelaveina, ma o nei subchannels e mafai foi ona faʻasaʻo i tulafono faʻasaʻo sese. ina ia mautinoa le maualalo o mea sese o le felauaiga.

 

5、E maualuga le faʻaogaina o le alalaupapa.

E taua tele lenei mea i si'osi'omaga uaealesi ma fa'atapula'a punaoa o alaleo, lea o le fa'aogaina o alaleo o le faiga e foliga mai e 2Baud/Hz pe a tele le numera o subcarriers.

 

Fa'aoga le COFDM tekonolosi ile IWAVE's wireless video transmitter

I le taimi nei COFDM o loʻo faʻaaogaina lautele i le DVB (Digital Video Broadcasting), DVB-T, DVB-S, DVB-C ma isi mo le televave o faʻasalalauga faʻamatalaga UAV.

 

Faatasi ai ma le atinaʻeina o tekonolosi, o loʻo i ai le tele o drones ma UAV o loʻo tautua mo tagata i galuega eseese.O lo'o taula'i le IWAVE i le fa'atulagaina, atina'e, ma le fa'atau atu o fofo feso'ota'iga uaealesi mo va'alele fa'atau ma robotics.

Ole fofo ole 800Mhz, 1.4Ghz, 2.3Ghz, 2.4Ghz ma le 2.5Ghz,5km-8km, 10-16km ma le 20-50km vitio ma numera Bi-directional Serial Data Links ma COFDM tekinolosi.

Ole saosaoa maualuga ole lele ole matou system support e 400km/h.I le taimi o le saoasaoa maualuga, e mafai foi e le faiga ona mautinoa le faʻamautu o faʻailoga vitio.

 

Mo le pupuu 5-8km, OFDM e faʻaaogaina mo le UAV / FPV poʻo le Tele rotor vitio faʻasalalau mo vitio, faʻailoga Ethernet ma faʻamaumauga faʻasologa e pei oleFIP-2405maFIM-2405.

Mo le umi 20-50km, matou te fautuaina lenei faasologa oloa e peiFIM2450maFIP2420

O lo'o fa'aaogaina e le IWAVE le tekonolosi COFDM maualuga i a tatou oloa, taula'i i le atina'eina o le fa'aogaina vave o feso'ota'iga fa'alavelave fa'afuase'i.Faʻavae i luga o le 14 tausaga o faʻaputuina tekinolosi ma poto masani, matou te taʻitaʻia le faʻaogaina e ala i le faʻamaoni o meafaigaluega ma le malosi NLOS malosi, ultra umi mamao ma le mautu galuega galue i le UAV, robotics, taavale fesoʻotaʻiga maketi maketi.

Fautuaga o Oloa Fa'atatau


Taimi meli: Apr-20-2023