Demodulation is extracting the original information-bearing signal from a carrier yoj. Lub demodulator yog ib qho hluav taws xob hluav taws xob (lossis khoos phis tawj program hauv lub xov tooj cua software-txhais lus) uas yog siv los rov qab cov ntaub ntawv cov ntsiab lus los ntawm kev hloov pauv cov cab kuj yoj.
demodulation tshwm sim nyob qhov twg?
Demodulation yog txheej txheem tseem ceeb hauv txais tos ntawm ib qho amplitude modulated signals txawm siv rau kev tshaj tawm lossis ob txoj xov tooj cua sib txuas lus. Demodulation yog cov txheej txheem los ntawm cov thawj cov ntaub ntawv bearing teeb liab, piv txwv li cov modulation yog muab rho tawm los ntawm tag nrho cov tau txais cov teeb liab.
Cov cuab yeej twg peb siv rau AM demodulation?
A diode detector yog cov khoom siv yooj yim tshaj plaws siv rau AM demodulation. Lub diode ntes tau tsim nrog lub diode thiab ob peb lwm yam khoom. Modems yog siv rau ob qho tib si modulation thiab demodulation.
Vim li cas peb thiaj xav tau kev hloov pauv thiab kev hloov pauv?
Modulation yog kauj ruam tseem ceeb hauv kev xa cov teeb liab. Peb cov lus teeb liab feem ntau yog lub teeb liab tsawg zaus thiab txoj kev poob ntawm lub teeb liab yog proportional rau lub square ntawm wavelength (thiab li no inversely proportional rau lub square ntawm zaus).
qhov kev hloov pauv thiab kev siv demodulation nyob qhov twg?
Ib tus modem (los ntawm modulator–demodulator), siv hauv kev sib txuas lus bidirectional, tuaj yeem ua ob qho haujlwm. Cov zaus band nyob los ntawm cov teeb liab modulation yog hu uabaseband, thaum lub suab ntau zaus nyob los ntawm tus cab kuj hloov pauv hu ua passband.
