Digital Signal Processing Lab Experiment

1) To synthesize the sequence x(n)=1,,1,2,2,3,3,2,1 for -2<=n<=5

Solution:
n=[-2:5];
x=[1,1,2,2,3,3,2,1];
plot(n,x,'o')
stem(n,x)

Write this on your MATLAB software and then you will see the graph.


2) To synthasize the expoonential impulse response x(n)=(0.9)^n for index values n=0,1,2, ..........,50

Solution:
n=[0:50];
x=(0.9).^n;
plot(n,x,'o')
grid

Write this on your MATLAB software and then you will see the graph.

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Digital Signal Processing Lab Experiment 2

3) Superimposing two plots for comparison (N.B.- Problem 1 & 2)

Solution:
y=exp(-n/10);
plot(n,y,'+');
hold on
plot(n,x,'o');
hold off

Write this on your MATLAB software and then you will see the graph.


4) To generate a complex valued exponential sequence

Solution:
x=exp((2+3j)*n);
subplot(2,2,1)
plot(n,real(x),'o');
subplot(2,2,2);
plot(n,imag(x),'o');
subplot(2,2,3);
plot(n,abs(x),'o');

Write this on your MATLAB software and then you will see the graph.

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Another Boring Day

Today i passed a highly busy and boring day. I start my day at 7:30 am because my class started at 8:30. The subject was "Power & Industrial Electronics". Interesting subject but class time was 3 hr. This is really difficult to keep full concentration all the time. After that at 1-2:30 was the lab on that subject. Then another interesting & most important subject "Digital Signal Processing (DSP)" from 2:30 to 4:00 pm. So it was a busy day. Beside that all day in Dhaka see heavy rain full day. This make boring because i hate the dirty water, which was on the road.

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Exp. no. 1 (DSP)

1)Name of exp.: Sinusoidal wave expression.
2)Theory: (N.B.: What is sine & cosine wave).
3)Program:
t=0:0.25:8*pi;
subplot(4,1,1);
plot(t,sin(t));
subplot(4,1,2)
plot(t,cos(t));
subplot(4,1,3)
x=sin(t)+.75*sin(3*t)+.5*sin(5*t)+.25*sin(7*t)+.125*sin(9*t);
plot(t,x);
subplot(4,1,4);
plot(t,x);
hold on;
plot(t,cos(t));
4)output:
5)Discussion:

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