tele 2060 pulse modulation what if the carrier signal were a pulse train instead of a sinusoid three approaches pulse amplitude modulation pam pulse width modulation pwm pulse position modulation ...
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...Tele pulse modulation what if the carrier signal were a train instead of sinusoid three approaches amplitude pam width pwm position ppm each these uses discrete to carry an analog martin b h weiss university pittsburgh bandwidth vf v is duration th n harmonic vn t sinc interval between pulses i e period x find zeros nx we need location sin this occurs when nt that by substitution let f so at nf first zero or frequency note following most energy contained in and thus can ignore higher components example sec spectrum st calculate khz nd modulate stream with used dimension pbx s type am system categories natural top conforms shape makes mathematics easy flat more practical for narrow vt mtpt m modulating waveform p fourier equivalent where same general form cos mtv c mf fs mhz terms vmt angular sampling observation completely dc component low pass filtering be demodulation...