Dab tsi yog baseband thiab bandpass teeb liab?
Dab tsi yog baseband thiab bandpass teeb liab?

Video: Dab tsi yog baseband thiab bandpass teeb liab?

Video: Dab tsi yog baseband thiab bandpass teeb liab?
Video: muaj support pi network lawm,xyuam sim raug foob pi kaw lej nyiaj 2024, Kaum ib hlis
Anonim

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: