Video: Peb puas tuaj yeem xa cov teeb liab digital ncaj qha mus rau bandpass channel?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
nws xav tau kev hloov kho. Broadband kis tau tus mob ua tau siv bandpass channel . A bandpass channel yog a channel nws bandwidth tsis pib ntawm xoom. Yog muaj channel yog bandpass , peb ua tsis tau xa tus cov teeb liab ncaj qha mus rau channel , nws yuav tsum tau hloov dua siab tshiab rau ib qho analog form ua ntej kis tau tus mob.
Ib yam li ntawd, qhov txawv ntawm bandpass thiab baseband signals yog dab tsi?
Passband kis tau tus mob yog kis tau tus mob aftershifting baseband frequencies rau qee qhov ntau zaus dua siv cov kev hloov pauv. Yog tias baseband teeb liab istransmitted ncaj qha ces nws yog hu ua baseband kis tau tus mob. Yog modulated teeb liab yog kis tau tus channel, nws yog hu ua bandpass kis tau tus mob.
band pass channel yog dab tsi? Lub passband yog qhov ntau ntawm frequencies lossis wavelengths uas tuaj yeem ua tau hla los ntawm lub lim. Lub passband ntawm ib tug receiveris qhov ntau ntawm frequencies nws tau txais. A bandpass -filtered signal (uas yog, lub teeb liab nrog lub zog tsuas yog nyob rau hauv passband), yog hu ua a bandpass teeb liab, nyob rau hauv sib piv rau ib tug baseband teeb liab.
Yog li ntawd, hom teeb liab twg tuaj yeem kis tau los ntawm broadband?
Baseband kis tau tus mob siv digital signaling thiab suav nrog digital teeb liab los yog hluav taws xob impulse uas ua tau nqa mus rau hauv lub cev tawm xws li cov xov hlau. Cov broadband kis tau tus mob siv analog signaling uas cuam tshuam nrog optical teeb liab los yog teeb liab nyob rau hauv daim ntawv ntawm anelectromagnetic yoj.
Vim li cas cov kev hloov pauv digital yuav tsum muaj?
Digital Modulation yog siv los hloov a digital me ntsis kwj dhau ib qho analog channel ntawm highfrequency. Qhov no ua rau peb xa cov teeb liab generated hauv ib digital Circuit Court hla ib lub cev nruab nrab. Qhov no yog vim digital Cov teeb liab tuaj yeem ua haujlwm nrog kev ruaj ntseg dua thiab digital systems tau yooj yim thiab dav.
Pom zoo:
Cov pov thawj ncaj qha thiab tsis ncaj yog dab tsi?
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