Q. signal to noise ratio can be improved by _ modulation
Solution:
- In FM, SNR can be improved by lowering the frequency of the modulating signal, since the decrease in the modulating frequency increases the modulation index.
- In Pulse Modulation, the modulation index depends only on phase deviation and not on modulating frequency.
- So better SNR and hence less noise effect an be obtained in FM at lower modulating frequency.
- AM systems are very sensitive to random noise.
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