Aliasing yog ib lo lus uas feem ntau siv hauv thaj chaw ntawm cov teeb liab ua tiav. Thaum lub teeb liab analog yog digitized, ib feem ntawm lub teeb liab uas siab tshaj ib nrab ntawm cov qauv los yog digitizing zaus yuav yog 'aliased.
Vim li cas thiaj siv lub npe?
Qee lub sij hawm aliasing yog siv intentionally on signals uas tsis muaj cov ntsiab lus tsawg zaus, hu ua bandpass signals. Undersampling, uas tsim tsawg-frequency aliases, tuaj yeem tsim cov txiaj ntsig zoo ib yam, nrog kev siv zog tsawg dua, raws li qhov zaus-hloov lub teeb liab kom qis zaus ua ntej ua piv txwv ntawm tus nqi qis dua.
Yuav ua li cas yog aliasing piv txwv?
Aliasing: Aliasing yog hais txog qhov xwm txheej uas tib qhov chaw nco tuaj yeem nkag tau siv cov npe sib txawvPiv txwv li, yog tias ib txoj haujlwm siv ob lub pointers A thiab B uas muaj nqi ib yam, ces lub npe A[0] aliases lub npe B[0] i.e., peb hais tus pointers A thiab B alias ib leeg.
siv cov lim tshuaj tiv thaiv kab mob nyob qhov twg?
Cov lim dej tiv thaiv tsis zoo yog siv ntawm cov tswv yim ntawm analog-rau-digital converterCov ntxaij lim dej zoo sib xws yog siv los ua cov lim dej rov qab los ntawm cov khoom siv digital-rau-analog converter. Nyob rau hauv rooj plaub tom kawg, lub lim tiv thaiv kev yees duab, cov txheej txheem rov qab ntawm aliasing qhov twg hauv-band zaus yog mirrored tawm ntawm band.
Yuav ua li cas aliasing?
Thaum twg aliasing tshwm sim? Kev piav qhia: Aliasing ua rau cov cim sib txawv los ua qhov tsis txawv txav thaum kuaj. Nws tshwm sim thaum tus nqi piv txwv tsawg dua tus nqi Nyquist.
