Weecasho noqnoqoshada

Joogtaynta - taasi waa mid ka mid ah sifooyinka of Ilodanimada inayan reer oscillations beegiddaba jirka ah marka la eego qiimaha celceliska. In physics, waxaa jira noocyo badan oo gariirka ee dabiiciga ah oo kala duwan, tusaale ahaan, isbedbedelka duurka ku electromagnetic. Waxa intaa dheer in hirarka lama filaan ah electromagnetic asal ahaan dabiiciga ah, waxaa jira isbedbedelka, dhacdo taas oo la siiyo by doonista nin si ay u xaliyaan dhibaatooyinka gaarka ah ee ka timi baahida hawlaha aadanaha. Inta badan taasi oo ka geeddi oscillatory wax looga qabto arrimaha kala iibsiga tamarta iyo / ama macluumaadka, ie Waa in isgaarsiinta, raadiyaha, telefishanka iyo shaqada, iwm

Geedi socodka ah ee gudbinta macluumaadka waxaa ka mid ah diyaarinta duurka tamarta u dhiganta oo ay isbedbeddelka of signal ka waxtar leh iyo guud ahaan waxaa inta jeer a gudbiye side la qiyamka lagu qeexay dhimaya - Ilodanimada inayan iyo inta jeer. Halbeegga ugu horreeyey waa kan saamiyeed si ay field tamarta, iyo go'aan ka fogaanshaha gudbinta, iyo tan labaad - addressee ah. Marka marxaladdan waxaan leenahay signal side kaliya, kaalintaa fulinteeda xogta "side".

content The macluumaad duurka tamarta la soo bandhigay galay signal ah by isbeddel baahisey kasta oo xuduudaheedu ay. In dhaqanka, u isticmaalaan fursadaha kala duwan inuu wax ka beddelo oo xuduudaheedu berrinka - iyo habka this waxaa la yiraahdaa inta jeer side isbedbeddelka. Xaaladdan oo kale, isbedelka waxaa laga codsadaa side, ama Ilodanimada inayan ee weecasho inta jeer side. Marka marxaladdan ee noqday radio inta badan la isticmaali isbedbeddelka Ilodanimada inayan a, halkaas oo macluumaadka ku jira Ilodanimada inayan of signal side. Haddii side this badala in saxnimada Ilodanimada
Macluumaadka soo noqnoqda signal analog. macaamiisha helo signalka
ku salaysan inta jeer side, ka dibna u qoondaysaa demodulator dhexdeeda ku jira
macluumaadka. At mawjadaha yar yahay, ilaa kala duwan-mowjadaha gaagaaban ah, iyadoo la isticmaalayo isbedbeddelka Ilodanimada kaliya. Its faa'iido weyn waa isbedelka ku dhacay Ilodanimada inayan ee soo noqnoqoshada side, ay sabab u tahay taas oo signalka - ratio buuqa, tilmaame muhiim ah tayada channel isgaarsiinta waa la dhimay.

Sidoo kale isbedbeddelka ee Ilodanimada, waayo gudbinta macluumaadka loo isticmaalo, iyo inta jeer ee taas ku leexasho inta jeer la dabaqay. Faa'iidada of noqnoqoshada
isbedbeddelka - difaac qaylada sare, si xirfad leh
Nidaamka Isgaarsiinta waxaa loo isticmaalaa signalada gaar chastotnomodulirovannye. Tusaale codsiga of calaamadaha sida - radio VHF, telefishanka, isgaarsiinta gaar ah.

Weecasho - ugu badnaan inta jeer side isbedelka qaraabo ah in celcelis ahaan of miraheeda. spectrum ee oscillation noqnoqoshada-meyxaanahaa side waxay ku xiran tahay Ilodanimada inayan ee signalka waxtar leh iyo Ilodanimada inayan ma kala duwan yihiin, ku dheehan yahay xasiloonida xiriir waa ka sii badan hore.

inta jeer side ee qalabka isbedbeddelka inta jeer ee waxaa loo yaqaan signal modulators. Doorkooda gudbinta calaamadaha radio - control matoor inta jeer side gudbiye ah. Go'aansado leexasho ku soo noqnoqoshada
shuruudaha width ee bandwidth ka mid ah labada gudbiye iyo qof qaata.

Tan iyo shuruudaha ugu muhiimsan ee channel isgaarsiinta a - signal hore laga yaabaa in badan oo sax ah la isugu gudbiyo, bandwidth reer wareeggeedii aqbasho-saarka oo ka mid ah aqbalana iyo gudbiye waa in ay ahaadaan ugu yaraan qiimaha double ah bandwidth signal asalka ah. Si kastaba ha ahaatee, halkan waxaan ku leeyihiin si ay u eegaan, waayo, "celceliska dahab ah", maxaa yeelay, keentaa weecasho dhinaca gudbiye la xiriirin karo oscillations ee dulinka sababa shucaaca Ngcuka oo labada pickups, iyo abuurista faragelinta ula kac ah, sida mid ka mid ah sida loola macaamilo dhalanrog sida signalka - xadaynta ee bandwidth ah. Sida caadiga ah laga hadlo xidhiidhka ka dhexeeya weyn
sifooyinka weecasho - iyo width ee ruxid band ee spectrum ee signalka kala qaado.

Haddii jirrabo isbedbeddelka ku leeyihiin qiimo weyn, labada koobin, taas oo
lagu gartaa weecasho inta jeer ah, waxay leeyihiin qiyaas magnitude isku. weecasho ayaa qiyaasay in cutub oo Hz soo noqnoqoshada.