Difference between Phase Modulation PM with Frequency-00231
This subjective question is related to the book/course
vu cs101 Introduction to Computing.
It can also be found in
vu cs101 Mid Term Solved Past Paper No. 4.
Question 1: Difference between Phase Modulation(PM) with Frequency Modulation(FM)?
Answer:
Phase modulation (PM)
Simpler hardware requirements
Phase is modulated with the amplitude
Amplitude & Frequency of the carrier signal remain constant
Frequency Modulation (FM)
Frequency of carrier signal is changed according to the amplitude of modulating signal
Amplitude and Phase of the carrier signal remain constant
FM Bandwidth
Bandwidth of FM signal (modulated signal) = 10 * bandwidth of modulating signal Significant spectrum of FM audio = 15 KHz
Minimum 150 KHz bandwidth
(page 96-97)
