Vim li cas kev hloov pauv hloov pauv tsim nyog lossis xav tau?

Cov txheej txheem:

Vim li cas kev hloov pauv hloov pauv tsim nyog lossis xav tau?
Vim li cas kev hloov pauv hloov pauv tsim nyog lossis xav tau?
Anonim

Ntawm Lub Hwj Chim Lub Zog Lub zog ntawm cov lus ceeb toom yuav tsum tau nce ntxiv kom nws thiaj li mus tau ntev dua. Qhov no yog qhov uas modulation yog qhov tseem ceeb. Qhov tseem ceeb tshaj qhov xav tau ntawm kev hloov kho yog txhawm rau txhim kho lub zog ntawm lub teeb liab yam tsis muaj kev cuam tshuam rau cov teeb meem ntawm lub teeb liab.

Vim li cas kev hloov pauv yog qhov tsim nyog lossis xav tau?

Modulation yog cov txheej txheem siv los xa cov ntaub ntawv xov xwm tsawg zaus los ntawm cov neeg nqa khoom nthwv dej. Ib qho cuab yeej ntawm tus neeg nqa khoom nthwv dej yog sib txawv hauv kev faib ua feem ntawm cov teeb liab modulating lossis cov ntaub ntawv teeb liab. Modulation yog tsim nyog vim muaj ntau yam. Tshooj 3, Teeb meem 2Q tau daws.

Vim li cas thiaj tsim nyog hloov kho?

Varying zaus ntawm tus cab kuj yojyog ua los ntawm cov txheej txheem ntawm kev hloov kho. … Li no los ntawm ntau zaus, peb tuaj yeem tiv thaiv kev cuam tshuam thiab cov teeb liab tuaj yeem xa mus los ntawm tib lub channel. Qhov no kuj yog qhov zoo rau Multiplexing ntawm signals.

Kev hloov pauv yog dab tsi thiab vim li cas nws thiaj xav tau?

Modulation tsuas yog cov txheej txheem siv dav hauv kev sib txuas lus uascov neeg nqa khoom siv nthwv dej ntau zaus siv los xa cov xov xwm tsawg zaus kom cov teeb liab kis mus ntxiv kom muaj tag nrho cov ntaub ntawv muaj nyob rau hauv thawj cov lus ceeb toom.

Vim li cas qhov kev hloov pauv tsim nyog Dab tsi yog amplitude modulation?

Ua kom kis tau tus mobua tau, kev hloov kho tau qhia, piv txwv li, muab cov lus los ntawm lub sijhawm teeb tsa xws li cosine ⁡ (Ω 0 t), tus cab kuj, nrog ntau zaus ntau dua li cov teeb liab acoustic. Amplitude modulation muab cov zaus loj dua uas xav tau los txo qhov loj ntawm tus kav hlau txais xov.

Pom zoo: