Video: Dab tsi yog baseband thiab bandpass teeb liab?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Baseband kis tau tus mob yog ua rau lub teeb liab tsis muaj kev hloov pauv, thiab nws haum rau kev sib txuas lus luv luv. Bandpass kis tau tus mob yog ua rau themodulated teeb liab hloov ntawm baseband frequency mus rau ntau zaus, thiab nws yuav tsum tau nyob rau hauv ib tug ntev kev sib txuas lus.
Tsis tas li ntawd, baseband thiab passband teeb liab yog dab tsi?
Baseband kev xa xov xa cov ntaub ntawv teeb liab raws li nws tsis muaj kev hloov pauv (tsis muaj zaus hloov pauv) thaum passband kis tau tus mob hloov teeb liab yuav kis tau nyob rau hauv zaus mus rau ib tug ntau zaus thiab ces kis nws, qhov twg ntawm tus receiver teeb liab isshifted rov qab mus rau nws qhov qub zaus.
Dab tsi yog qhov txawv ntawm kev sib txuas lus baseband thiab kev sib txuas lus bandpass? Qhov sib txawv ntawm kev sib kis ntawm baseband thiab bandpasstransmission . Cov baseband kis tau tus mob tsis siv modulator thiab demodulator. Yog tias baseband teeb liab yog kis ncaj qha ces nws yog hu ua basebandtransmission . Yog hais tias modulated teeb liab yog kis tau tus mob overthe channel, nws yog hu ua bandpass kis tau tus mob.
Nyob rau hauv txoj kev no, dab tsi yog lub teeb liab baseband?
A baseband teeb liab yog thawj kis teeb liab uas tsis tau modulated, los yog tau demodulated rau nws thawj zaus. Feem ntau cov kev cai sib txuas lus xav tau baseband teeb liab yuav tsum tau hloov dua siab tshiab, los yog modulated, mus rau ib tug ntau zaus ces lawv yuav kis tau nyob rau longdistances.
Dab tsi yog bandpass channel?
A bandpass channel yog a channel uas bandwidth tsis pib ntawm xoom. A bandpass channel muaj ntau tshaj qhov lowpass channel . Yog muaj channel yog bandpass , peb tsis tuaj yeem xa cov digitalsignal ncaj qha mus rau channel , nws yuav tsum tau hloov mus rau hauv daim ntawv ananalog ua ntej kis tau tus mob.
Pom zoo:
Lub teeb liab thiab cov ntaub ntawv yog dab tsi?
Lub teeb liab sawv cev rau txoj kev koj sib txuas lus: SayAM / FM xov tooj cua, haus luam yeeb, tes taw, thiab lwm yam. Datadenotestheinformation conveyed in the signal. Tab sis cov ntaub ntawv tuaj yeem khaws cia. Yog li lub teeb liab yuav xa cov ntaub ntawv (cov ntaub ntawv), tab sis tsis yog tag nrho cov ntaub ntawv qhia
Lub teeb liab rau lub suab nrov yog dab tsi thiab vim li cas nws tseem ceeb?
Lub teeb liab rau lub suab nrov piv yog qhov tseem ceeb vim hais tias hauv kev sib txuas lus peb lub ntsiab tseem ceeb yog lub teeb liab tab sis thaum lub sij hawm kis tau tus mob tau cuam tshuam los ntawm qee lub suab nrov. Thaum kawg tau txais peb xav kom muaj tib lub teeb liab sib kis, kom ua tiav qhov no lub suab nrov yuav tsum tau txo qis thiab ntawm no SNR ua lub luag haujlwm tseem ceeb
Dab tsi yog qee qhov teeb meem kev coj ncaj ncees thiab teeb meem cuam tshuam nrog khoos phis tawj thiab kev sib txuas lus hluav taws xob?
Qee qhov teeb meem no yog qhov tshiab (xws li luam theej duab software), thaum lwm tus yog cov tshiab version ntawm cov teeb meem qub txog qhov raug thiab tsis ncaj ncees, kev ncaj ncees, kev ncaj ncees, lub luag haujlwm, tsis pub lwm tus paub, kev ntseeg siab, kev lav phib xaub, thiab kev ncaj ncees. Cov neeg siv ntsib qee qhov teeb meem no thaum cov kws tshaj lij hauv computer ntsib tag nrho lawv
Peb puas tuaj yeem xa cov teeb liab digital ncaj qha mus rau bandpass channel?
Nws xav tau kev hloov kho. Broadband kis tau tus mob siv bandpass channel. Bandpass channel yog ib qho channel uas nws bandwidth tsis pib ntawm xoom. Yog hais tias qhov muaj channel yog bandpass, peb tsis tuaj yeem xa cov teeb liab digital ncaj qha mus rau channel, nws yuav tsum tau hloov mus rau ib qho analog form ua ntej kis tau tus mob
Lub teeb liab thiab nws hom yog dab tsi?
Ob hom kev taw qhia tseem ceeb ntawm kev ua haujlwm yog analog thiab digital. Daim duab qhia tau hais tias cov cim qhia tau tshwm sim los ntawm approximatingananalogsignal los ntawm nws qhov tseem ceeb ntawm lub sijhawm tshwj xeeb.Digital signals yog quantized, whileanalogsignals are nruam