Pulse-amplitude modulation (PAM), yog daim ntawv ntawm cov teeb liab hloov kho qhov twg cov lus qhia tau muab tso rau hauv lub amplitude ntawm cov teeb liab pulses. Nws yog ib qho analog pulse modulation tswvyim nyob rau hauv uas lub amplitudes ntawm lub tsheb ciav hlau ntawm carrier pulses yog varied raws li tus qauv tus nqi ntawm lub teeb liab.
Pulse amplitude modulation xam li cas?
Denoting the modulating signal as m(t), pulse amplitude modulation is achieved by multiplying the carrier with the m(t). Cov zis yog ib tug series ntawm pulses, lub amplitudes uas txawv nyob rau hauv kev faib ua feem rau lub modulating teeb liab.
Lub hom phiaj ntawm pulse amplitude modulation yog dab tsi?
Vim li cas siv mem tes amplitude modulation? PAM yog siv los hloov kho lub teeb liab nthwv dej thaum lub sijhawm xa cov ntaub ntawv. PAM yog hom kev hloov pauv hloov pauv mus rau digital.
Dab tsi yog qhov txawv ntawm ntuj PAM thiab Flat Top PAM?
Nyob rau hauv ntuj PAM, lub teeb liab coj mus kuaj ntawm Nyquist tus nqi tuaj yeem tsim kho dua tshiab, los ntawm kev dhau nws los ntawm kev ua tau zoo Low Pass Lim (LPF) nrog cov zaus txiav tawm. … Yog li no, kom tsis txhob muaj lub suab nrov no, siv cov piv txwv tiaj tus. Lub tiaj-sab saum toj PAM teeb liab tau pom hauv daim duab hauv qab no.
PAM ppm PWM yog dab tsi?
Pulse modulation yog ib hom kev hloov kho uas lub tsheb ciav hlau ntawm cov pulses tau siv los ua tus neeg nqa khoom nthwv dej thiab ib qho ntawm nws qhov tsis xws li amplitude yog modulated thiaj li nqa tau cov ntaub ntawv. Pulse modulation muab faib ua ob hom xws li analog thiab digital modulation.
