Find the bandwidth for the following situations if we need to modulate a 5-KHz voice.
a. AM
b. PM (setß=3)
c. PM (set p=1)
Given the frequency of the voice signal -
"(f)=5kHz"
a) Bandwidth of the amplitude modulation "B_{AM}=2B"
"=2\\times 5kHz"
"=10kHz"
b) Bandwidth required for the phase modulation
"B_{PM}=2(1+\\beta)B"
Now, substituting the values,
="2(1+3)\\times 5 kHz"
"=40kHz"
c) Bandwidth required for the phase modulation,
"B_{PM}=2(1+\\beta)B"
Now, substituting the values,
"=2(1+1)\\times 5kHz"
"=20kHz"
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