Bandlimited interpolation ntawm cov cim tsis sib xws yog cov cuab yeej yooj yim uas muaj kev siv dav hauv kev ua cov teeb liab digital. Feem ntau, qhov teeb meem yog kom suav cov teeb liab qhov tseem ceeb ntawm arbitrary nruam lub sij hawm los ntawm ib txheej ntawm discrete-time qauv ntawm lub teeb liab amplitude.
Bandlimited txhais li cas?
Bandlimiting yog qhov txwv ntawm a lub teeb liab zaus sawv cev lossis spectral ntom rau xoom saum ib qho kev txiav txim siab. Lub teeb liab txwv band yog ib qho uas nws Fourier hloov pauv lossis spectral ntom tau muaj kev txhawb nqa. Lub teeb liab bandlimited yuav yog random (stochastic) los yog tsis-random (deterministic).
Vim li cas peb thiaj siv Bandlimited signals?
Ib lub teeb liab bandpass yog tus cwj pwm los ntawm a bandwidth tsis khi los ntawm xoom ntawm nws qis kawg . … Yog li ntawd, peb tuaj yeem siv cov kev hloov me me hauv qhov zaus, uas tso cai rau qhov ntsuas zaus qis dua qhov xav tau rau lub teeb liab uas nws cov spectrum nyob txhua zaus ntawm xoom mus rau α U.
Koj tuaj yeem qhia tau li cas yog tias lub teeb liab yog Bandlimited?
Raws li tau hais los ntawm Fadi Mkhayel, txhawm rau nkag siab yog tias lub teeb liab raug txwv koj yuav tsum nrhiav nws Fourier series. Lub series yog tsim los ntawm "kev txhaum" thiab "cos". Yog hais tias lub series txuas mus rau infinity ces lub teeb liab yuav tsis bandlimited. Hauv koj rooj plaub koj tsuas muaj 2 zaus xwb, lub teeb liab yog band txwv.
But what is the Fourier Transform? A visual introduction
