Homework Answers
The above problem owns a simple logic compared to plotting of regular fm signal, The message signal which is sinusodal in our case must be having only positive values for this the code is written such that the modulus of message signal(i.e abs of message signal) is taken considering the equation of FM.
I'm attaching the code below:
For frequency domain analysis convert the same above time domain signal in to frequency domain by fourier transform and then plot them..
we can use the built in functions available in matlab for calculating the fourier transform of the frequency modulated signal and similarly plot the spectrum
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FM spectrum: A message signal m(t) (shown below) is used to modulate a carrier with frequency (fc...
5. A msg m(t) that is used too modulate a carrier and frequency (fc) is 1500 in a FM system. Kf i...
Complete using matlab
5. A msg m(t) that is used too modulate a carrier and frequency (fc) is 1500 in a FM system. Kf is 80. Plot the FM signal in time AND frequency domain using Matlab. The signal is shown below, m(t) is zero for t>250ms and t<0 ms. m(t) (V) Half Sinusoid 3.5 t (ms) 250
5. A msg m(t) that is used too modulate a carrier and frequency (fc) is 1500 in a FM system. Kf is...
1- Signal m(t) is shown in Figure 1. This signal is used once to frequency modulate a carrier and once to phase modulate the same carrier. a) Find a relation between kp and k such that the maximu...
1- Signal m(t) is shown in Figure 1. This signal is used once to frequency modulate a carrier and once to phase modulate the same carrier. a) Find a relation between kp and k such that the maximum phase of the modulated signals in both cases are equal. b) If kp k 1, what is the maximum instantaneous frequency in each case? m(r) 0
1- Signal m(t) is shown in Figure 1. This signal is used once to frequency modulate...
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....
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amp...
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amplitude spectrum, SPM(f), is shown below: Amplitude spectrum of the frequency modulated signal 2 -2 5000 4000 3000 2000 -1000 1000 2000 3000 4000 5000 frequency f [Hz] a) What is the carrier frequency fe? b) What is the message frequency fm c) What is the FM modulation index Bf? Is it a narrowband or a wideband signal? d) Using Carson's rule, estimate the transmission...
A message m(t) sinc2 (M) cos (2π9t) is used to modulate a carrier to produce an...
A message m(t) sinc2 (M) cos (2π9t) is used to modulate a carrier to produce an LSB-AM signal. (a) Find and sketch the spectrum of m(t); determine and sketch the spectrum of mh (t) graphically; determine m,(t) by finding the inverse Fourier transform of the previous spectrum; determine the LSB-AM message signal expression. (b) Sketch the spectrum of the DSB-SC signal 2m(t) cos 2mfet; remove the upper sideband and sketch the resulting LSB spectrum; determine the LSB-AM message signal expression...
Let m(t) = cos wmt denote the message signal to modulate with wm = 200 Hz....
Let m(t) = cos wmt denote the message signal to modulate with wm = 200 Hz. The carrier frequency is given by We = 100 Hz. You will perform modulation and demodulation of double sideband-suppresed carrier (DSB-SC). 1. Modulate m(t). (4 pts) Note: Denote the result of modulation as Smod(t). 2. Demodulate Smod(t). (6 pts) Note: Denote the result of modulation as Sdem(t). Note: To get full credits, strictly mark on m(t) recovered.
We would like to modulate the message x(t) = sin(2000πt). For FM modulation take k=200000π and...
We would like to modulate the message x(t) = sin(2000πt). For FM modulation take k=200000π and for PM modulation take k=8000π. a) Estimate the bandwith of FM modulated signal yFM(t) and PM modulated signal yPM(t). b) Repeat part (a) if the message signal amplitude is doubled. c) Repeat part(a) if the message signal frequency is doubled. d) Comment on the sensitivity of FM and PM bandwidths to the spectrum of x(t).
When the message signal m (t) =cos (2π fmt) and the carrier signal is c(t)=cos (2π fct) , fm<&...
When the message signal m (t) =cos (2π fmt) and the
carrier signal is c(t)=cos (2π fct) ,
fm<< fc,
The modulated DSB-SC signal
SDSB-SC=m(t)cos(2πfct) is generated, and only
the upper sideband
To generate and transmit the SSB signal. As shown in the figure
below, the receiver is a local oscillator
cosine signal to the received signal and passes it through a
low-pass filter. Answer the following questions.
(a) Draw the waveform of DSB-SC modulated signal
SDSB-SC(t）
(b)Find the result...
2. [20 points] The carrier c(t-Acce(2106 t) is frequency modulated by the sinusoid signal m(t) 2cos...
2. [20 points] The carrier c(t-Acce(2106 t) is frequency modulated by the sinusoid signal m(t) 2cos (2000mt). The deviation constant is kr 3000 Hz/V Determine the bandwidth of the modulated signal using Carson's rule a. Sketch the magnitude of the spectrum of the modulated signal (plot only those frequency components that lie within the bandwidth derived in part a) with detailed information such as the areas of delta function determined by the Bessel function, frequency separation between each spectrum (note...
In frequency Modulation (FM), the instantaneous frequency of a sinusoidal carrier wave will be modified proportionally...
In frequency Modulation (FM), the instantaneous frequency of a
sinusoidal carrier wave will be modified proportionally to the
variation of amplitude of the message signal. Use Matlab to build
an FM modulation and demodulation process. The FM coefficient is
Kf=80, and the carrier frequency is 300Hz.
1. Generate a baseband signal as show below. Plot the baseband
signal in time domain and frequency domain. 2. Create an FM process and
plot the modulated signal in time and frequency domain.
-1...
Complete using matlab
5. A msg m(t) that is used too modulate a carrier and frequency (fc) is 1500 in a FM system. Kf is 80. Plot the FM signal in time AND frequency domain using Matlab. The signal is shown below, m(t) is zero for t>250ms and t<0 ms. m(t) (V) Half Sinusoid 3.5 t (ms) 250
5. A msg m(t) that is used too modulate a carrier and frequency (fc) is 1500 in a FM system. Kf is...
1- Signal m(t) is shown in Figure 1. This signal is used once to frequency modulate a carrier and once to phase modulate the same carrier. a) Find a relation between kp and k such that the maximum phase of the modulated signals in both cases are equal. b) If kp k 1, what is the maximum instantaneous frequency in each case? m(r) 0
1- Signal m(t) is shown in Figure 1. This signal is used once to frequency modulate...
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....
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amplitude spectrum, SPM(f), is shown below: Amplitude spectrum of the frequency modulated signal 2 -2 5000 4000 3000 2000 -1000 1000 2000 3000 4000 5000 frequency f [Hz] a) What is the carrier frequency fe? b) What is the message frequency fm c) What is the FM modulation index Bf? Is it a narrowband or a wideband signal? d) Using Carson's rule, estimate the transmission...
A message m(t) sinc2 (M) cos (2π9t) is used to modulate a carrier to produce an LSB-AM signal. (a) Find and sketch the spectrum of m(t); determine and sketch the spectrum of mh (t) graphically; determine m,(t) by finding the inverse Fourier transform of the previous spectrum; determine the LSB-AM message signal expression. (b) Sketch the spectrum of the DSB-SC signal 2m(t) cos 2mfet; remove the upper sideband and sketch the resulting LSB spectrum; determine the LSB-AM message signal expression...
Let m(t) = cos wmt denote the message signal to modulate with wm = 200 Hz. The carrier frequency is given by We = 100 Hz. You will perform modulation and demodulation of double sideband-suppresed carrier (DSB-SC). 1. Modulate m(t). (4 pts) Note: Denote the result of modulation as Smod(t). 2. Demodulate Smod(t). (6 pts) Note: Denote the result of modulation as Sdem(t). Note: To get full credits, strictly mark on m(t) recovered.
When the message signal m (t) =cos (2π fmt) and the
carrier signal is c(t)=cos (2π fct) ,
fm<< fc,
The modulated DSB-SC signal
SDSB-SC=m(t)cos(2πfct) is generated, and only
the upper sideband
To generate and transmit the SSB signal. As shown in the figure
below, the receiver is a local oscillator
cosine signal to the received signal and passes it through a
low-pass filter. Answer the following questions.
(a) Draw the waveform of DSB-SC modulated signal
SDSB-SC(t）
(b)Find the result...
2. [20 points] The carrier c(t-Acce(2106 t) is frequency modulated by the sinusoid signal m(t) 2cos (2000mt). The deviation constant is kr 3000 Hz/V Determine the bandwidth of the modulated signal using Carson's rule a. Sketch the magnitude of the spectrum of the modulated signal (plot only those frequency components that lie within the bandwidth derived in part a) with detailed information such as the areas of delta function determined by the Bessel function, frequency separation between each spectrum (note...
In frequency Modulation (FM), the instantaneous frequency of a
sinusoidal carrier wave will be modified proportionally to the
variation of amplitude of the message signal. Use Matlab to build
an FM modulation and demodulation process. The FM coefficient is
Kf=80, and the carrier frequency is 300Hz.
1. Generate a baseband signal as show below. Plot the baseband
signal in time domain and frequency domain. 2. Create an FM process and
plot the modulated signal in time and frequency domain.
-1...
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