Question

Specify the frequency response characteristics of a VSB filter
that passes the lower sideband and the first frequency component of
the upper sideband of a DSB modulated signal with the message
signal given by m(t)=10cos(3000(pi)t)+20cos(6000(pi)t) . The
carrier signal has an amplitude of 20 and a frequency of 250
kHz.

a. Write the expression for the DSB signal.

b. Write the expression for the single sided spectrum of the DSB
signal

c. Sketch the spectrum

d. Give the specifications for the VSB filter

Answer #1

Generate a Matlab Code for amplitude modulated signal by
multiplying a message signal (a low frequency cosine signal) with a
carrier signal (a high frequency cosine signal).
Sketch the Fourier transform of the modulated signal.
Demodulate the modulated signal (with no noise) by again
multiplying it with the same carrier signal.
Sketch the Fourier transform of the signal obtained in c).
Your task is to recover the message signal from the signal in
c). Determine the type of filter you...

A carrier signal, Vc(t) = 5cos(1π3000t) F is frequency
modulated by a modulating
signal of 4 kHz with a modulation
index of 2. The FM wave is transmitted through a 50 Ω antenna. With
the aid of Bessel Function Table, determine the:
number of sets of significant sidebands,
frequency deviation,
carrier swing,
minimum and maximum frequency of the FM signal,
bandwidth using Bessel Function Table,
frequencies of all the significant sidebands,
total power of the FM signal.
Hence, sketch and...

Below are three different codes in Matlab, please copy those
your matlab and answer the following questions:
Thank you for your help!!!!
1.1 Baseband Signal
a) Plot time versus baseband signal (m_sig).
b) Plot freq versus baseband signal spectrum (M_fre).
1.2 Amplitude Modulation – Suppressed Carrier.
a) Plot time versus the DSB-SC signal (s_dsb).
b) Plot freq versus the DSB-SC signal spectrum (S_dsb).
1.3 Coherent Demodulation
a) Plot freq versus the pre-filtered signal (S_dem).
b) Plot freq versus the post-filtered...

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