HAREESH
- Rate TSh 13,762
- Response 1h
TSh 13,762/hr
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- Mathematics
- Trigonometry
- Arithmetic
I am maths tutor,i have good experiencein chegg Indiaand coursehero and other
- Mathematics
- Trigonometry
- Arithmetic
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About HAREESH
−TC
=[1+αm
n
(t)]x
c
(t)
The message that you need to modulate is a DTMF signal and can be expressed as: \[ m(t)=A_{m}\left[\sin \left(2 \pi f_{H} t\right)+\sin \left(2 \pi f_{L} t\right)\right] \] You are modulating the signal with the following carrier signal \[ x_{c}(t)=A_{c} \cos \left(2 \pi f_{c} t\right) \] In the same figure, plot the time and frequency domain representation of the message, carrier and modulated signal (see figure in next page for what you needed to show). You need to create multiple plots for different modulation index
α
as specified below. Used
A
c
=1,A
m
=1,f
c
=8kHz
and use
100kHz
sampling frequency. Look for DTMF Assignment excel sheet for
f
H
and
f
L
You may use provided functio [fvector,
X
]
=dsb
fplot(Fs, X) to help you plot frequency plots. a)
α=0.5
b)
α=1
c)
α=1.5
Plot requirement: Need to be
3×2
sublots. Show only
5 ms
of signal in time domain and
±8kHz
in frequency domain. Follow the format as much as possible. Indicate peaks on frequency spectrum as shown in the figure. Using MATLAB, calculate the power of message, carrier and modulated signal and efficiency for each modulation index. You need to use trapz to do integration over 1 period and divided by the period.
MATLAB
Fl = 697
Fh = 1477
See more
About the lesson
- Primary school
- Ordinary Level
- Form 5
- +10
levels :
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Ordinary Level
Form 5
Form 6
Ordinary Diploma
Tertiary Education
Adult Education
Bachelor’s Degree
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PhD / Doctorate
PGDLP
MBA
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- English
All languages in which the lesson is available :
English
−TC
=[1+αm
n
(t)]x
c
(t)
The message that you need to modulate is a DTMF signal and can be expressed as: \[ m(t)=A_{m}\left[\sin \left(2 \pi f_{H} t\right)+\sin \left(2 \pi f_{L} t\right)\right] \] You are modulating the signal with the following carrier signal \[ x_{c}(t)=A_{c} \cos \left(2 \pi f_{c} t\right) \] In the same figure, plot the time and frequency domain representation of the message, carrier and modulated signal (see figure in next page for what you needed to show). You need to create multiple plots for different modulation index
α
as specified below. Used
A
c
=1,A
m
=1,f
c
=8kHz
and use
100kHz
sampling frequency. Look for DTMF Assignment excel sheet for
f
H
and
f
L
You may use provided functio [fvector,
X
]
=dsb
fplot(Fs, X) to help you plot frequency plots. a)
α=0.5
b)
α=1
c)
α=1.5
Plot requirement: Need to be
3×2
sublots. Show only
5 ms
of signal in time domain and
±8kHz
in frequency domain. Follow the format as much as possible. Indicate peaks on frequency spectrum as shown in the figure. Using MATLAB, calculate the power of message, carrier and modulated signal and efficiency for each modulation index. You need to use trapz to do integration over 1 period and divided by the period.
MATLAB
Fl = 697
Fh = 1477
See more
Rates
Rate
- TSh 13,762
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- 5h: TSh 65
- 10h: TSh 130
online
- TSh13,762/h
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