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AMPLITUDE MODULATION 1. Study in time and frequency domains of AM signals This AM signal is...
Assume that an AM transmitter is modulated with a video testing signal given by em(t) =...
Assume that an AM transmitter is modulated with a video testing signal given by em(t) = =20 + 60 sin (2πf1t), where f1 = 3.57 MHz. Let the carrier signal c(t) = Ac cos(2πfct), where Ac = 100 and fc = 100 MHz. The AM signal is fed into a 50-Ω load. (a) Derive an expression for the AM DSB-FC signal in time domain. (b) Construct the AM waveform, giving numerical values of the maximum amplitude, Amax and the minimum...
1 2 4. The amplitude modulation signal is given by the following expression and is applied...
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4. The amplitude modulation signal is given by the following expression and is applied to 75 load. Vam(t) = 10 sin (21fct) - 2.5 cos (1500krt) + 2.5 cos (1450krt) V Determine: a) Modulation index b) The frequency of the carrier and the information signal c) The bandwidth d) The total power e) The transmission power efficiency be ar e 5. One of the inputs to a frequency modulator is a 250 kHz carrier signal with amplitude of...
Please write clearly Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A...
Please write clearly
Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A baseband message signal mt) is shown below. b shows the frequency spectrum of mýtj. A carrier signal cost was used in DSB-SC AM moduition of m/t). Describe how the modulated signal can be created (is) Draw the frequency spectrum of modulated signal. (iv) Describe how the message signal demodulated and recovered at the receiving side. (4 5 20 points)
an expression nM() for an AM signal with a carrier frequency of 2 MHz that conveys...
an expression nM() for an AM signal with a carrier frequency of 2 MHz that conveys a 1. (a) Write down sine wave message whose frequency is 2 peak-to-peak amplitude is 70 Volts. 500 Hz. The AM signal's modulation index is 0.75 and its (b) Compute the power efficiency n of this signal.
12. An FM signal has a deviation of 3 kHz and a modulating frequency of 1...
12. An FM signal has a deviation of 3 kHz and a modulating frequency of 1 kHz. Its total power Pris 5 W, developed across a 50 2 resistive load. The carrier frequency is 160 MHz (a) Calculate the RMS signal voltage VI (b) Calculate the RMS voltage at the carrier frequency and each of the first three sets of sidebands. (c) For the first three sideband pairs, calculate the frequency of each sideband. (d) Calculate the power at the...
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz)...
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz) 1920 2000 2080 2080 2000 1920 (a) (10 points) Determine the carrier frequency fe the carrier amplitude Ac the mod ulation index ,, and the message signal m(t) of the AM signal. (b) (10 points) Given that μ2Sm 0.18, find the output SNR (in dB) if the received signal includes white noise with a power spectral density of η/2-10-10 W/Hz. (c)...
Problem 2 (Spectrum of a rectangular signal): In this problem, the amplitude spectrum of the signal 1 or Ot 2 ms x(t)- 0 otherwise is to be analysed (b) Numerical calculation of the spectrum: (i) Us...
Problem 2 (Spectrum of a rectangular signal): In this problem, the amplitude spectrum of the signal 1 or Ot 2 ms x(t)- 0 otherwise is to be analysed (b) Numerical calculation of the spectrum: (i) Use Matlab to generate and plot a vector containing the sample values of the rectangular signal defined in (2) sampled at f 8kHz. Choose the number N of sample values so that it is a power of 2 and that the signal duration is at...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message as given in equation: s(t) Ae[1 + m (cos w,t + cos2m t)] cos at, P2. From the result in question Pl give an expression for the AM signal s(t) as the real part of complex exponentials Sketch a rotating phasor diagram for s(t) using the carrier frequency as a reference Р3. Write down the Fourier transform of s(t) in question P1. Sketch the...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message as given in equation: s(t) Ae[1 + m (cos w,t + cos2m t)] cos at, P2. From the result in question Pl give an expression for the AM signal s(t) as the real part of complex exponentials Sketch a rotating phasor diagram for s(t) using the carrier frequency as a reference Р3. Write down the Fourier transform of s(t) in question P1. Sketch the...
The alternating signal with an amplitude of 0.9 V, a frequency of 1 KHz, and a phase of -22.5° is o.TV dc b.as. Try connecting this signal to a load resistance of 50 Q to test the waveform 1.E...
The alternating signal with an amplitude of 0.9 V, a frequency of 1 KHz, and a phase of -22.5° is o.TV dc b.as. Try connecting this signal to a load resistance of 50 Q to test the waveform 1.Express circuit as CAD drawing 2.Show output graph through Transient analysis in PSPICE 3.Calculate the instantaneous value at 0.1 second and compare it with the result of 2 4.When connecting the signal to the A and B terminals of the voltage distribution...
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4. The amplitude modulation signal is given by the following expression and is applied to 75 load. Vam(t) = 10 sin (21fct) - 2.5 cos (1500krt) + 2.5 cos (1450krt) V Determine: a) Modulation index b) The frequency of the carrier and the information signal c) The bandwidth d) The total power e) The transmission power efficiency be ar e 5. One of the inputs to a frequency modulator is a 250 kHz carrier signal with amplitude of...
Please write clearly
Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A baseband message signal mt) is shown below. b shows the frequency spectrum of mýtj. A carrier signal cost was used in DSB-SC AM moduition of m/t). Describe how the modulated signal can be created (is) Draw the frequency spectrum of modulated signal. (iv) Describe how the message signal demodulated and recovered at the receiving side. (4 5 20 points)
an expression nM() for an AM signal with a carrier frequency of 2 MHz that conveys a 1. (a) Write down sine wave message whose frequency is 2 peak-to-peak amplitude is 70 Volts. 500 Hz. The AM signal's modulation index is 0.75 and its (b) Compute the power efficiency n of this signal.
12. An FM signal has a deviation of 3 kHz and a modulating frequency of 1 kHz. Its total power Pris 5 W, developed across a 50 2 resistive load. The carrier frequency is 160 MHz (a) Calculate the RMS signal voltage VI (b) Calculate the RMS voltage at the carrier frequency and each of the first three sets of sidebands. (c) For the first three sideband pairs, calculate the frequency of each sideband. (d) Calculate the power at the...
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz) 1920 2000 2080 2080 2000 1920 (a) (10 points) Determine the carrier frequency fe the carrier amplitude Ac the mod ulation index ,, and the message signal m(t) of the AM signal. (b) (10 points) Given that μ2Sm 0.18, find the output SNR (in dB) if the received signal includes white noise with a power spectral density of η/2-10-10 W/Hz. (c)...
Problem 2 (Spectrum of a rectangular signal): In this problem, the amplitude spectrum of the signal 1 or Ot 2 ms x(t)- 0 otherwise is to be analysed (b) Numerical calculation of the spectrum: (i) Use Matlab to generate and plot a vector containing the sample values of the rectangular signal defined in (2) sampled at f 8kHz. Choose the number N of sample values so that it is a power of 2 and that the signal duration is at...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message as given in equation: s(t) Ae[1 + m (cos w,t + cos2m t)] cos at, P2. From the result in question Pl give an expression for the AM signal s(t) as the real part of complex exponentials Sketch a rotating phasor diagram for s(t) using the carrier frequency as a reference Р3. Write down the Fourier transform of s(t) in question P1. Sketch the...
P1 Using trigonometry write down a Fourier series representation for the AM signal with a message as given in equation: s(t) Ae[1 + m (cos w,t + cos2m t)] cos at, P2. From the result in question Pl give an expression for the AM signal s(t) as the real part of complex exponentials Sketch a rotating phasor diagram for s(t) using the carrier frequency as a reference Р3. Write down the Fourier transform of s(t) in question P1. Sketch the...
The alternating signal with an amplitude of 0.9 V, a frequency of 1 KHz, and a phase of -22.5° is o.TV dc b.as. Try connecting this signal to a load resistance of 50 Q to test the waveform 1.Express circuit as CAD drawing 2.Show output graph through Transient analysis in PSPICE 3.Calculate the instantaneous value at 0.1 second and compare it with the result of 2 4.When connecting the signal to the A and B terminals of the voltage distribution...
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