Q.N. 1:- An AM index between 0 and 1 indicates what? a. the AM signal is...

Q.N. 1:-

An AM index between 0 and 1 indicates what?

		a. the AM signal is very small and will not be detected by the receiver
		b. distortion of the signal will prevent detection and demodulation
		c. the received modulated signal will have minimal distortion
		d. the AM index is not important

Q.N. 2:-

Given the following AM modulated signal, determine the original message, m(t):

s(t) = 2.5[1+0.5 cos(2π25kHzt)] cos(2π88MHzt)

		a. m(t) = 1.25cos(2π25kHz*t)
		b. m(t) = 1.25cos(2π88MHz*t)
		c. m(t) = 2.5cos(2π25kHz*t)
		d. m(t) = 2.5cos(2π88MHz*t)

Q.N. 3:-

Given the following AM modulated signal, determine the occupied frequency bandwidth(note: assume double-sideband large carrier (DSB-LC):

s(t) = 2.4[1+0.7 cos(2π33Hz*t)] cos(2π10GHz*t)

		a. Frequency bandwidth = 33 Hz
		b. Frequency bandwidth = 66 Hz
		c. Frequency bandwidth = 10GHz
		d. Frequency bandwidth = 20GHz

Q.N. 4:-

Given the following message and carrier equations, determine the AM modulated signal equation: m(t)=4cos(2π4kHz*t), c(t)=4cos(2π3GHz*t)

		a. s(t)=2[1 + 0.67cos(2π4000t)]cos(2π3GHz*t)
		b. s(t)=2[1 + 0.67cos(2π3E9t)]cos(2π4kHz*t)
		c. s(t)=4[1 + 1cos(2π4000t)]cos(2π3E9t)
		d. s(t)=4[1 + 1.5cos(2π3GHz*t)]cos(2π4000t)

Expert Solution

venereology answered 2 hours ago

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