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a. Show that a lower-sideband SSB signal can be demodulated by the synchronous detector shown below...
Please do Part 4 and Show all work! 1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure b...
Please do Part 4 and Show all work!
1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure by using frequency discriminator. Assume no attenuation of the signal due to propagation loss (in other words assume amplifiers properly restored the amplitude of the transmitted signal at the receiver) [10 points] Find the Fourier Series (trigonometric Fourier Series) of the message signal m (t) where To...
4.4-6 An LSB signal is demodulated coherently, as shown in Fig. P4.4-6. Unfortunately, because of the...
4.4-6 An LSB signal is demodulated coherently, as shown in Fig. P4.4-6. Unfortunately, because of the transmission delay, the received signal carrier is not 2 cos Wet as sent, but rather, is 2 cos[wc + Aw)t + 8). The local oscillator is still cos wct. Show the following. (a) When 8 = 0, the output y(t) is the signal m(t) with all its spectral components shifted (offset) by Ao. Hint: Observe that the output y(t) is identical to the right-hand...
b) The figure below shows an FM demodulator. s'(t)Envelope detector Demodulated signal s(t) Differentiator Figure 4: Question 2(b) In the system above, the differentiator performs the time-differ...
b) The figure below shows an FM demodulator. s'(t)Envelope detector Demodulated signal s(t) Differentiator Figure 4: Question 2(b) In the system above, the differentiator performs the time-differentiation operation s'(t) = as(t). Also, the envelope detector is assumed to be ideal, capable of extracting the envelope of the incoming signal perfectly. Describe, by equations, how the above FM demodulator may exactly recover the message signal from the FM signal. (6%) (c) Is the FM demodulator in Question 2(b) a coherent detector,...
Make sure you show all working and describe each step in your calculations. 1. A signum function ...
signals and communications 2
Make sure you show all working and describe each step in your calculations. 1. A signum function is defined as sgn(t) = { 1、12 0 1 t<0 Plot and express this function in terms of the unit-step function. 5 marks/ Determine and plot the even and odd parts of the signal 2. x(t) (te-3 +2)u(t). 5 marks 3. If prove that y[n-m] = x[n-m] * h[n]. 5 marks 4. Assuming α > 0, plot the signal...
FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc...
Solve using Matlab:
FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc) in a FM system with kr 90, find and plot the FM signal s(t) in both time and frequency domains. Use the value of fc-1000. m(t) (V) 3.5 t (ms) 250 [Note that m(t) is zero for t<0 and t>250 ms
FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc) in a...
Cny e upper sldeband (uSB) and lower sideband (LSB) spectra. (5 polnts) Al 2. Figure-1 below show...
Cny e upper sldeband (uSB) and lower sideband (LSB) spectra. (5 polnts) Al 2. Figure-1 below shows a DSB-SC modulator. The carrier avaliable at the multiplier is a distorted sinusoid given by c(t)- Cos3(wet). The spectrum of m(t) is shown in Figure-2 M(f) m(t) Fllter -В c(t) Figure-2 Figure 1 a. Determine the signals and sketch their spectra at points b and c. (5 points). b. What kind of filter is required in Figure-1? Verify your answer. (5 points). c....
(SULIT) C. A slope detector is probably the simplest FM demodulator, however it has several disadvantages...
(SULIT) C. A slope detector is probably the simplest FM demodulator, however it has several disadvantages which include poor linearity, difficulty in tuning, and lack of provisions of limiting. Suggest the best demodulation circuit technique that can resolve those problems. Show the relevant FM demodulator circuit and explain how this suggested demodulation circuit/technique is suitable in solving such issues. (CO2: PO2 - 7 marks) d. A periodic square wave m(t) of period T, frequency modulates a carrier of frequency fc...
Prob. 4 Consider the coherent receiver shown in the diagram below. The input signal is first...
Prob. 4 Consider the coherent receiver shown in the diagram below. The input signal is first passed through a mixer before it is demodulated. The frequency of Oscillator I is related to the incoming carrier frequency as fo-f+ fi at all times, where fi is the intermediate frequency. Let the input signal be in the form φ(t) cos 2r/mlt cos 2 πfet, where fe » fm. mo (t) φ(t) BPF 1 Oscillator Oscillator (a) Specify the frequencies present at points...
below is used to modulate a carrier to generate the AM signal yt) (Am()) cos(1000t) The periodic signal m() shown a) The power efficiency of the system is measured to be 1 () The type of AM modula...
below is used to modulate a carrier to generate the AM signal yt) (Am()) cos(1000t) The periodic signal m() shown a) The power efficiency of the system is measured to be 1 () The type of AM modulation, i.e. SSB, DSBSC, (i) The constant A. (ili) The modulation index 1/13. Determine DSB with carrier enit -3 b) An angle modulated signal is given by d(t-2 cos (2n1061+ sin 2 1000). Find i) The carrier frequency. ii) The baseband signal bandwidth....
4.1. Preliminary work Derive an expression for the output of the product detector from the block...
4.1. Preliminary work Derive an expression for the output of the
product detector from the block diagram in Figure 4-1 Product
Detector assuming that the input is a single tone modulated DSBSC
signal. Also show the effect on the output if the local carrier is
out of phase from the modulated carrier by 45 degree.
4. DSB-SC (Suppressed Carrier) Detection Demodulation of DSB-SC signals is achieved by using a product detector as shown in Figure 4-1 Product Detector below. The...
Please do Part 4 and Show all work!
1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure by using frequency discriminator. Assume no attenuation of the signal due to propagation loss (in other words assume amplifiers properly restored the amplitude of the transmitted signal at the receiver) [10 points] Find the Fourier Series (trigonometric Fourier Series) of the message signal m (t) where To...
4.4-6 An LSB signal is demodulated coherently, as shown in Fig. P4.4-6. Unfortunately, because of the transmission delay, the received signal carrier is not 2 cos Wet as sent, but rather, is 2 cos[wc + Aw)t + 8). The local oscillator is still cos wct. Show the following. (a) When 8 = 0, the output y(t) is the signal m(t) with all its spectral components shifted (offset) by Ao. Hint: Observe that the output y(t) is identical to the right-hand...
b) The figure below shows an FM demodulator. s'(t)Envelope detector Demodulated signal s(t) Differentiator Figure 4: Question 2(b) In the system above, the differentiator performs the time-differentiation operation s'(t) = as(t). Also, the envelope detector is assumed to be ideal, capable of extracting the envelope of the incoming signal perfectly. Describe, by equations, how the above FM demodulator may exactly recover the message signal from the FM signal. (6%) (c) Is the FM demodulator in Question 2(b) a coherent detector,...
signals and communications 2
Make sure you show all working and describe each step in your calculations. 1. A signum function is defined as sgn(t) = { 1、12 0 1 t<0 Plot and express this function in terms of the unit-step function. 5 marks/ Determine and plot the even and odd parts of the signal 2. x(t) (te-3 +2)u(t). 5 marks 3. If prove that y[n-m] = x[n-m] * h[n]. 5 marks 4. Assuming α > 0, plot the signal...
Solve using Matlab:
FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc) in a FM system with kr 90, find and plot the FM signal s(t) in both time and frequency domains. Use the value of fc-1000. m(t) (V) 3.5 t (ms) 250 [Note that m(t) is zero for t<0 and t>250 ms
FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc) in a...
Cny e upper sldeband (uSB) and lower sideband (LSB) spectra. (5 polnts) Al 2. Figure-1 below shows a DSB-SC modulator. The carrier avaliable at the multiplier is a distorted sinusoid given by c(t)- Cos3(wet). The spectrum of m(t) is shown in Figure-2 M(f) m(t) Fllter -В c(t) Figure-2 Figure 1 a. Determine the signals and sketch their spectra at points b and c. (5 points). b. What kind of filter is required in Figure-1? Verify your answer. (5 points). c....
(SULIT) C. A slope detector is probably the simplest FM demodulator, however it has several disadvantages which include poor linearity, difficulty in tuning, and lack of provisions of limiting. Suggest the best demodulation circuit technique that can resolve those problems. Show the relevant FM demodulator circuit and explain how this suggested demodulation circuit/technique is suitable in solving such issues. (CO2: PO2 - 7 marks) d. A periodic square wave m(t) of period T, frequency modulates a carrier of frequency fc...
Prob. 4 Consider the coherent receiver shown in the diagram below. The input signal is first passed through a mixer before it is demodulated. The frequency of Oscillator I is related to the incoming carrier frequency as fo-f+ fi at all times, where fi is the intermediate frequency. Let the input signal be in the form φ(t) cos 2r/mlt cos 2 πfet, where fe » fm. mo (t) φ(t) BPF 1 Oscillator Oscillator (a) Specify the frequencies present at points...
below is used to modulate a carrier to generate the AM signal yt) (Am()) cos(1000t) The periodic signal m() shown a) The power efficiency of the system is measured to be 1 () The type of AM modulation, i.e. SSB, DSBSC, (i) The constant A. (ili) The modulation index 1/13. Determine DSB with carrier enit -3 b) An angle modulated signal is given by d(t-2 cos (2n1061+ sin 2 1000). Find i) The carrier frequency. ii) The baseband signal bandwidth....
4.1. Preliminary work Derive an expression for the output of the
product detector from the block diagram in Figure 4-1 Product
Detector assuming that the input is a single tone modulated DSBSC
signal. Also show the effect on the output if the local carrier is
out of phase from the modulated carrier by 45 degree.
4. DSB-SC (Suppressed Carrier) Detection Demodulation of DSB-SC signals is achieved by using a product detector as shown in Figure 4-1 Product Detector below. The...
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