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GATE 2024 Communication System Foundation Quiz 35

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Question 1

Consider the frequency modulated signal 
With carrier frequency of 105 Hz. The modulation index is

Question 2

A sinusoidal carrier wave of frequency of fc =100M Hz is exponentially modulated by a modulating signal x(t). find maximum and minimum instantaneous frequency.    

 if resulting signal is PM with sensitivity kP= 10π Hz/v

Question 3

A carrier frequency modulated with a sinusoidal signal of frequency 4 kHz resulting in a maximum frequency deviation of 7kHz. The bandwidth of modulated signal is

Question 4

13 signals each is band limited to 7 kHz are to be transmitted over a single channel. If AM DSB modulation technique is used and the guard band of 1.5 kHz is present then the bandwidth of the multiplexed signal is ________kHz.

Question 5

An angle modulated signal expressed as

The signal is

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