Q4. Answer A) An AM/DSB-LC signal has a power of 140 watt, the maximum frequency of the baseband signal is 3.4 kHz, while the carrier frequency is 50 kHz. If the additive noise power spectral density (two-sided) in the transmission channel is: S„ (w) = (10-6 x Vw) watt/Hz 1- Draw the spectrum of the AM signal. 2- Find the SNR in the transmission channel.
Q4. Answer A) An AM/DSB-LC signal has a power of 140 watt, the maximum frequency of the baseband signal is 3.4 kHz, while the carrier frequency is 50 kHz. If the additive noise power spectral density (two-sided) in the transmission channel is: S„ (w) = (10-6 x Vw) watt/Hz 1- Draw the spectrum of the AM signal. 2- Find the SNR in the transmission channel.
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![Q4. Answer
A) An AM/DSB-LC signal has a power of 140 watt, the maximum frequency of the baseband signal is 3.4
kHz, while the carrier frequency is 50 kHz. If the additive noise power spectral density (two-sided) in
the transmission channel is:
S„ (w) = (10-6 × vw) watt/Hz
1- Draw the spectrum of the AM signal.
2- Find the SNR in the transmission channel.
B) A carrier signal has a frequency of 120 kHz is AM/SSB,SC modulated by the message signal
10 cos (4n x 10°t) volt:
1. Draw the block diagram of the transmitter.
2. Sketch the spectrum of the modulated wave.
3. Calculate the sideband power and transmission efficiency.
4. Calculate the transmission bandwidth.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feed77b4e-a2cc-4821-8d4b-0bd2fef74e40%2F50f20f96-5ccd-4885-aa62-2a87c02dbb8d%2Fck4cw7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q4. Answer
A) An AM/DSB-LC signal has a power of 140 watt, the maximum frequency of the baseband signal is 3.4
kHz, while the carrier frequency is 50 kHz. If the additive noise power spectral density (two-sided) in
the transmission channel is:
S„ (w) = (10-6 × vw) watt/Hz
1- Draw the spectrum of the AM signal.
2- Find the SNR in the transmission channel.
B) A carrier signal has a frequency of 120 kHz is AM/SSB,SC modulated by the message signal
10 cos (4n x 10°t) volt:
1. Draw the block diagram of the transmitter.
2. Sketch the spectrum of the modulated wave.
3. Calculate the sideband power and transmission efficiency.
4. Calculate the transmission bandwidth.
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