A matsayin masana'anta na ƙwararruhanyoyin sadarwar bidiyo mara waya, Mun ci amanar masu amfani akai-akai suna tambayar ku: tsawon zangon kuUAV COFDM Mai watsa Bidiyo or Bayanan Bayani na UGVkai?
Don amsa wannan tambayar, muna kuma buƙatar bayani kamar tsayin shigarwar eriya / yanayin ƙasa / cikas, da sauransu. Ayyukan rediyo mara waya abu ɗaya ne kawai.A haƙiƙa, ta wannan cikakken bincike ne kawai zai iya tantance ainihin nisan sadarwar mara waya.Sai dai irin wannan kima yana buƙatar ilimi da ƙwarewa da yawa.
Wannan shafin yanar gizon zai samar da wasu hanyoyi na asali da ka'idoji don taimaka muku yanke wasu hukunce-hukunce game da nisan sadarwa.
Anan akwai abubuwan da suka shafi nisan sadarwa da ingancin suTsarin watsa Bidiyo mara waya.
1. Bayani dalla-dalla na samfurin watsa bidiyo mara waya
● Ƙarfin RF: a yafi RFikon na watsawaiyaisaa ya fi tsayinisan sadarwa.
Themafi girmaƘarfin RF, mafi nisa taguwar ruwa na iya tafiya.Dangantaka tsakanin ikon fitarwa damara wayaNisa na sadarwa yana da sabanin murabba'i, wato ikon fitarwa ya ninka sau biyu, kuma nisan sadarwa sau biyu shine tushen asali.Ƙarfin fitarwa shine sau 4 na asali, kuma nisan sadarwa shine sau 2 na asali.
● Karɓar Hankali: Ƙarƙashin hankalin karɓa, mafi kyau
Karɓar hankali yana nufin ƙaramin matakin wandarediyon sadarwa mara wayaiya karba da gane. Lokacin danisaya fi tsayikuma ƙarfin siginar ya zama mai rauni sosaier, ƙananan hankalirediyohavefa'idar ɗaukar siginar, wato, yana iya aiki a nesa mai nisa.
2. Radiation
Yaduwar igiyoyin rediyo wani lamari ne na filin lantarki.Yana tafiya a matsayin igiyar ruwa a filayen lantarki da na maganadisu.
Yaya ake watsa igiyoyin rediyo daga eriya?:
Amfani da wannan hanyar don bayyana yaɗuwar raƙuman rediyo har yanzu ba ta da ɗanɗano. Misali, har yanzu mutane suna tambaya, "Yaya girman da'irar?""Mene ne a wajen da'irar?"
Don haka, don ba da ƙarin fahimta game da fitar da rediyo.muna amfani da fitila mai kyalli don kwaikwaya radiyo kamar yadda ke ƙasa hoto (3).
Bgaskiyayana da ƙarfia tsakiyakuma mai rauni a duka karshen, yana nuna tsananin rarraba hasken da ke fitowa daga fitilar.Ana iya kwatanta wannan al'amari da eriya don watsawa mara waya, inda ƙarfin sigina a tsakiya ya yi girma kuma ƙarfin siginar a ƙarshen biyu ya yi ƙasa.Wannan's dalilitsayin shigarwa na eriya muhimmin abu ne yana shafar nisan sadarwa.
3.Abubuwan Muhalli
Ƙarfin rediyon "yana ɓata" daga eriya kuma yana tafiya zuwa sararin samaniya kyauta.Akwai filayen lantarki da na maganadisu a tsaye a sarari kyauta.Ƙarfin rediyo yana tafiya a cikin nau'i na "taguwar ruwa" da ke "ripple" ta cikin wani fili.
Lokacin da makamashin rediyo ya yaɗa ta hanyar igiyoyin lantarki, zai gamu da cikas, kuma zai haifar da abubuwa masu kama da tunani ko refraction kamar haske, taguwar ruwa, da igiyoyin iska kamar hoto (4).
Bayan an nuna kalaman radiyo sau ɗaya, yanayin igiyoyin zai canza gaba ɗaya.Kololuwa sun zama kwanukan ruwa, tukwane kuma su zama kwarkwata.Tabbas, akwai kuma daidaituwa cewa hanyar da aka nuna ba ta wuce rabin zango ba fiye da hanyar kai tsaye.Sa'an nan kuma za a sami kololuwa a kan kololuwa, da magudanan ruwa a kan magudanar ruwa, kuma siginar za ta kasance mai ƙarfi sosai.
LOS (Layin Gani) sadarwar mara waya yana da hanyoyi guda biyu na yaduwa: kai tsaye da mai tunani.Idan akwai wani cikas a cikin shugabanci na yadawa, don haka an toshe hanyar kai tsaye, ana iya samun siginar ta hanyar tunani kawai, wanda ake kira.ba layi-na-ganin baYaduwa (NLOS).An rage tasirin watsawa sosai.Akwai wani shari'ar kuma, tsayin cikas ba shi da tsayi sosai, ana iya isa hanyar kai tsaye.Amma irin wannan hanyar tunani na siginar "ingantattun" an toshe shi, kuma tasirin watsawa yana da girma.
A halin yanzu, aikin injiniya yana amfani da yankin Fresnel don kimanta tasirin cikas a kan hanyar sadarwa ta hanyar gani.Yankin Fresnel yana la'akari da yankunan kai tsaye da tunani.Matukar dai ba a samu cikas ba kuma babu cikas a wannan fanni, za a iya kiyasin tazarar kusantar sadarwa.
Chadawa
Mara wayamobilevra'ayitfansayana aiki a wurininda bangarorin biyu za su iya ganin juna ba dole ba ne sadarwa ta hanyar gani ba.Sai kawai lokacin da ƙasa a cikin yankin Fresnel ya gamsu za a iya cimma yanayin watsa layin-ganin.Me yakamataweyi idan akwai cikas?A cikin yanayin da ba za a iya motsa cikas ba, za mu iya ɗaga eriya bisa ga ka'idar yankin Fresnel.
Lokacin aikawa: Juni-20-2023
