Kutumiza opanda zingwe kumadutsa magawo awiri: kufalitsa kwa analogi ndi digito.Kutumiza kwa zithunzi za analogi kwathetsedwa m'mafakitale ambiri chifukwa cha kusokoneza kwake komanso kusokonezedwa ndi ma tchanelo ndi maphokoso apamwamba, zomwe zimapangitsa kuti pakhale zovuta pakugwiritsa ntchito.

Ndi kukhwima kwa ukadaulo wa OFDM ndi zigawo zake, zinthu zogwiritsa ntchito ukadaulo wa COFDM zakhala zida zapamwamba kwambiri zotumizira opanda zingwe.Ubwino wake ndi motere:

1, Ndi oyenera ntchito mu Palibe mzere-wa-kuona ndi obstructed mapangidwe monga madera akumidzi, ozungulira, ndi nyumba, ndipo amasonyeza kwambiri "diffraction ndi malowedwe" luso.

COFDM opanda zingwe chifaniziro zipangizo ali ndi ubwino wa "non-line-wa-kupenya" ndi "diffraction" kufala chifukwa chonyamulira Mipikisano chonyamulira ndi makhalidwe ena luso，M'matauni, mapiri, mkati ndi kunja nyumba ndi malo ena amene sitingawaone. ndi zolepheretsa, chipangizochi chikhoza kukwaniritsa kufalitsa kokhazikika kwa zithunzi ndi mwayi waukulu, ndipo sichikhudzidwa ndi chilengedwe kapena sichikhudzidwa kwambiri ndi chilengedwe.

Omnidirectional antennas nthawi zambiri amagwiritsidwa ntchito kumapeto kwa transceiver ndi wolandila, ndipo kuyika kwadongosolo kumakhala kosavuta, kodalirika, komanso kosinthika.

 

2, Ndi oyenera kufala mkulu-liwiro mafoni, ndipo angagwiritsidwe ntchito magalimoto, zombo, helikopita / drones ndi nsanja zina.

Ma microwave achikhalidwe, ma LAN opanda zingwe ndi zida zina sizingathe kuzindikira mwaokha kufalikira kwa ma transceiver kumapeto ndipo amatha kuzindikira kufalikira kwa malo am'manja kupita kumalo okhazikika pansi pazifukwa zina.Dongosolo lake lili ndi maulalo ambiri aukadaulo, uinjiniya wovuta, kudalirika kochepa, komanso mtengo wokwera kwambiri.

Komabe, pazida za COFDM, sizifuna zida zina zowonjezera, zimatha kuzindikira kugwiritsa ntchito zipinda zokhazikika, zam'manja, ndipo ndizoyenera kuyika pamapulatifomu am'manja monga magalimoto, zombo, ma helikopita / ma drones, ndi zina zambiri. Kutumiza kuli ndi kudalirika kwakukulu komanso ntchito zotsika mtengo.

 

3, Ndi oyenera kufala deta mkulu-liwiro, zambiri kuposa 4Mbps, kukumana kufala kwa kanema wapamwamba ndi zomvetsera.

Kuphatikiza pa zomwe zimafunikira makamera, makanema apamwamba kwambiri komanso ma audio ali ndi zofunika kwambiri pakuwongolera ma encoding mitsinje ndi mitengo yama tchanelo, ndipo wonyamula aliyense waukadaulo wa COFDM amatha kusankha QPSK, 16QAM, 64QAM ndi kusinthasintha kwina kothamanga kwambiri, komanso kuchuluka kwa njira. nthawi zambiri kuposa 4Mbps.Chifukwa chake, imatha kufalitsa 4: 2: 0, 4: 2: 2 ndi ma codec ena apamwamba kwambiri mu MPEG2, ndipo chiwongolero cha malekezero omwe alandirira amatha kufikira 1080P, chomwe chimakwaniritsa zofunikira pakuwunika pambuyo, kusungirako, kusintha ndi kusintha. zina zotero.

 

4, M'malo ovuta amagetsi, COFDM ili ndi chitetezo chokwanira kwambiri kuti chisokonezedwe.

Mu dongosolo limodzi lonyamulira limodzi, kusweka kumodzi kapena kusokoneza kungapangitse kuti chiyanjano chonse cholankhulirana chilephereke, koma mu multicarrier COFDM system, ndi gawo laling'ono chabe la subcarriers lomwe limasokonezedwa, ndipo ma subchannels awa angathenso kuwongoleredwa ndi zizindikiro zolakwika. kuwonetsetsa kuti pali cholakwika chochepa pakufalitsa.

 

5, Kugwiritsa ntchito njira ndikokwera kwambiri.

Izi ndizofunikira makamaka m'malo opanda zingwe okhala ndi zida zocheperako, pomwe ma spectrum amagwiritsidwira ntchito nthawi zambiri amakhala 2Baud/Hz pomwe kuchuluka kwa ma subcarriers kuli kwakukulu.