Suppose the message signal m(t) = sin(1000mt) volt where, 0 < t < 10 msec is sampled and quantized using 2 bits quantize
Posted: Tue Jun 07, 2022 10:26 am
Consider a message signal 5 cos(60mt). Let the unmodulated carrier signal be given by 10 cos(400mt). Assume that the message is used to frequency modulate the carrier with sensitivity 60 Hz/v. a. Write the expression for the modulated signal. b. Determine the modulation index beta? c. Would you classify this as a narrow-band FM or a wide-band FM? Justify your answer. d. Write the expression of Fourier transform of modulated signal? e. Using Carson's rule, determine the bandwidth of the modulated signal? f. Using significant sideband principle, determine the bandwidth of the modulated signal? 2. Using 99% of the modulated signal power, determine the bandwidth of the modulated signal?
The sinusoidal signal f(t) = acos(2nft) is applied to the input of an FM modulator. The corresponding modulated signal output (in Volts) for a 2V. f-100 klz, is (t) 100 cos[2m x 10'7t + 4 sin(2nft)] across a 112 resistive load. The total average power. developed by (t) is A NBFM signal with a modulation index 0.2 is applied to a frequency double (duplicate the frequency). The modulation index in the output signal will be