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SINGLE POLARITY:
In single polarity PAM the height of the pulse is made larger than the maximum negetive value of the signla so that it remains positive even when the input is negetive
DOUBLE POLATRITY:
In double polarity PAM the pulse height is made proportional to the amplitude of the signal at the instant of the sampling
P.Nagarjuna
B-tech 3rd year, ECE,
Sri Indu college of engineering and technology
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Which modulation scheme requires the least minimum bandwidth?
Suppressed carrier single sideband amplitude modulation - SCSSBAM.
In order to send more than one bit at a time during a single phase on a carrier modulation is used?
amplitude modulation is used
What are the different forms of amplitude modulation?
There are many types of modulation. A few examples...AmplitudeFrequencyPhase ShiftModified Frequency (MFM)Non Return to Zero Inverted (NRZI)Frequency Shift Keying (FSK)Other contributors - Please add to this list
What is meant by single side band modulation?
Single side band suppressed carrier modulation is like amplitude modulation except that one of the sidebands is suppressed or filtered out. Each sideband carries the same though opposite, information, so suppressing the one sideband allows more power to be placed into the one remaining sideband. The downside, of course, is that the demodulation process is more complex.
What is the difference between pulse code and pulse amplitude in brief and concise terms?
In pulse amplitude modulation (PAM), you send a single pulse of a certain height (amplitude) that represents the value of the sampled signal at that time. With pulse code modulation (PCM), you take the same sampled value, but now represent that value by N bits, where N is the number of quantized regions. Why send a whole bunch of bits instead of just a single pulse? Because PCM performs better in situations of higher noise (AWGN).
