4.
For a
signal x(n)=sin(2*pi*n/3) defined for n=0to7, evaluate the Fast
Fourier Transform using signal flow graph. (Use decimation in
frequency Algorithm)
4.
For a signal x(n)=sin(4*pi*n/5) defined for n=0to7, evaluate the
Fast Fourier Transform using signal flow graph. (Use decimation in
Time
Algorithm).
Using Matlab Simulink, find Fourier transform of the following
signal;
?(?) = 2 + ∑
1 ?
sin (20???)
4
?=1
.
Set simulation stop time = 20 seconds, sample time = (1/1024)
seconds, buffer size =1024, and frequency range in Hz for the
vector scope is −100 ≤ ? ≤ 100
What increase in speed can be expected in using a fast Fourier
transform algorithm rather than direct arithmetic to compute the
Fourier transform of an image of size 1024 × 1024?
Fourier Transform. Discuss the effects of multiplying a time
domain signal by a sinusoid (including multiple times) has on both
the time and frequency domain representations, as well as the
practical use of the method, i.e. summarize the conceptual
understanding within 100 words.