Mawu Oyamba
Pa nthawi yakulankhulana payekha of maulalo ovuta a wailesi, tkuphulika kwa mafunde a wailesizidzakhudza mtunda wolumikizana.M'nkhaniyi, tidzafotokoza mwatsatanetsatane kuchokera ku makhalidwe ake ndi magulu.
TheMakhalidwe Akuzirala a Mafunde a Radio
Mawonekedwe a ma radiation achindunji, refraction, kuwunikira, kubalalitsidwa, kusokoneza ndi kuyamwa kwa mafunde a wailesi kumapangitsa mafunde a wailesi kuti achepetse pang'onopang'ono ndikuwonjezeka kwa mtunda wofalikira.
(1) Ngati mafunde a wailesi afalikira kumtunda wokulirapo ndi wokulirapo komanso madera ozungulira malo aulere, mphamvu zamawayilesi zimabalalika mochulukira, zomwe zimapangitsa kuchepetsedwa kwa kufalikira (ie, kutayika kwa njira).Imatanthauzidwa ngati chiŵerengero cha kachulukidwe ka mphamvu pa mtunda wina wofalikira kuchokera ku gwero la ma radiation kupita ku mphamvu yamagetsi pamtunda wa unit, ndipo mtengo wake ndi wosiyana kwambiri ndi malo a mtunda wofalitsa.
(2) Pamene ikufalikira pakati, kuwonjezera pa kuchepetsedwa kwa kufalikira, mphamvu yamafunde a wailesi idzagwiritsidwanso ntchito ndi sing'anga, zomwe zimapangitsa kuti mayamwidwe awonongeke komanso kuchepetsa kusokoneza.Refractive index n ndi mayamwidwe attenuation mosalekeza ɑ mafunde a electromagnetic omwe akufalikira mu media zosiyanasiyana ndizosiyana.
Kutayika kwa njira yofalitsa chizindikiro cha wailesi yotumizidwa ndi siteshoni yoyambira kumakhudzidwa kwambiri ndi mtunda ndi zinthu zomwe zili pansi.Malo oyambira ali apamwamba, chizindikirocho chimayenda patali.
Kufalikira kwa mafunde a wailesi kumakhudzananso ndi pafupipafupi.Kukwera kwafupipafupi, kutayika kwakukulu kwa njira, kufooka kwa mphamvu ya diffraction, ndi kuyandikira mtunda wofalitsa.Mosiyana ndi ma frequency otsika.
Gulu la mafunde a wailesi akuzilala
(1) Malinga ndi mphamvu ya kuzimiririka kwa ma siginecha opanda zingwe, kuzimiririka kwa mafunde a wailesi panthawi yopatsirana pamalo opanda zingwe kumagawidwa kukhala3magulu:
●Average Path Loss—Avareji yamphamvu yolandirira siginecha imasiyanasiyana mosiyanasiyana ndi mphamvu yowonjezereka ya mtunda wautali.
● Kuzimiririka kwa mthunzi - pamene mafunde a wailesi akumana ndi mthunzi wa electromagnetic field chifukwa cha zopinga zosiyanasiyana pa njira yofalitsa, mlingo wake wapakati wapakati umasintha pang'onopang'ono ndi malo, nthawi ndi liwiro losuntha, lomwe limatchedwa mthunzi kufota (chifukwa cha kusintha pang'onopang'ono, kotero izo zimasintha pang'onopang'ono. imatchedwanso kuchepa pang'onopang'ono).
●Mulipath Fading - Kuzimiririka chifukwa cha kuchulukitsa kwa njira.Matalikidwe ndi gawo la mafunde opangidwa pamalo olandirira amasinthasintha mwachangu ndikuyenda kwa siteshoni yam'manja.Izi nthawi zambiri zimatchedwa multipath fading (zimatchedwanso kufota mwachangu chifukwa mphamvu ya siginecha yomwe idalandiridwa imasintha mwachangu).
(2) Malingana ndi kukula kwa kusintha kwa mphamvu ya m'munda wa chizindikiro cholandiridwa, kutha kwa mafunde a wailesi kumagawidwa mu 3.mitundu:
● Kuzimiririka kwakukulu - kumafotokoza kuchepetsedwa kwa chizindikiro chifukwa cha mtunda, ndi mawonekedwe a mphamvu ya siginecha yolandilidwa pakapita nthawi yayikulu (mazana kapena ma kilomita) zomwe zimasiyana ndi mtunda wotumizira ndi kulandira.
● Mesoscale Fading - Maonekedwe oyenda pang'onopang'ono apakati adalandira mphamvu ya siginecha pakapita sikelo yapakati (mazana a mafunde).
● Kuzimiririka kwakung'ono-kusinthika kofulumira kwa mtengo wanthawi yomweyo wa mphamvu yamunda wa chizindikiro cholandiridwa mu kagawo kakang'ono (makumi a mafunde).
Mu chilengedwe cha ma cellular pali zotsatira ziwiri:
1. Kuchulukirachulukira, kuzimiririka kwakanthawi kochepa komwe kumachitika chifukwa cha kusinkhasinkha ndi kubalalitsidwa kuchokera pamalo omanga kapena zinthu zina.
2. Kusintha kwapang'onopang'ono kwa nthawi yayitali mu mphamvu ya chizindikiro chachikulu chopangidwa ndi njira yowonekera mwachindunji.Njirayi imagwira ntchito mofulumira kwambiri yomwe imamvera kugawidwa kwa Rayleigh ndipo imayikidwa pamwamba ndi kuchepa kwapang'onopang'ono komwe matalikidwe a siginecha amagwirizana ndi kugawa kwabwino kwa logarithmic.
Malingaliro a kampani IWAVE COMMUNICATIONS CO., LTD.imagwira ntchito pakupanga ndi kupanga zida zazitali zopanda zingwe zopanda zingwe.Kupanga kwathu kosalekeza komanso magwiridwe antchito osayerekezeka kwatipatsa dzina lodalirika pamabizinesi opanda zingwe.
IWAVEamaperekamtundu wautali wa IP MESH, Maulalo a digito a NLOS a robotics,OEMEfanetimankhwalazakuyankhulana kwamphamvu, zinthu zopakidwa, ndikulankhulana opanda zingwe yaitalimachitidwe kwa makasitomala amalonda ndi mafakitale.Mayankho ofunikira a IWAVE ndi otetezedwa, kugawana ndikulankhulana mavidiyo a nthawi yeniyeni, mawu ndi deta patali komanso malo ovuta.
Nthawi yotumiza: Aug-15-2023
