DSP lab to essential signal generation

1. Digital Signal Processing
Experiment 1

2. GENERATION OF BASIC SIGNALS
(a). Program for the generation of UNIT impulse signal
clc;
close all;
clear all;
t=-2:1:2; % defining time axis and samples
y=[zeros(1,2),ones(1,1),zeros(1,2)] %defining magnitude at different
samples
stem(t,y); %plot discrete signal
xlabel('samples----')
Ylabel(‘magnitude’) % assigning labels to x and y axis
title('unit impulse'); %giving title

3. n = [-5:5];
imp = zeros(1,length(n));
imp(n==0) = 1;
stem(n,imp) %plot discrete signal
axis([-5 5 -2 2])
xlabel('samples----')
Ylabel(‘magnitude’) % assigning labels to x and y axis
title('unit impulse');

4. (b) Program for the generation of UNIT step signal
clc;
close all;
clear all;
n=input('enter the n value = ');
t=0:1:n-1;
y= ones(1,n);
stem(t,y);
axis([-5 5 -5 5])
xlabel('samples----')
ylabel('Magnitude')
title('unit step')

5. (b) Program for the generation of UNIT step signal
clc;
close all;
clear all;
n=[-5:5];
ramp = (n>=0).*n;
stem(n,ramp);
xlabel('samples----')
ylabel('Magnitude')
title('unit ramp');

6. Ramp signal using for loop
• for n = -4:4
• if n>= 0
• stem(n,n);
• hold on;
• else
• stem(1,0);
• hold on
• end
• end

7. Generate continuous time sinusoidal signal,
Discrete time cosine signal
clc;
close all;
clear all;
t=0:.01:pi;
y= sin(2*pi*t);
plot(t,y);
ylabel('amp...');
xlabel(‘samples...');
title('sin signal')

8. Assignment
Q1. Define and Compare C.T.S & D.T.S
Q.2 write a program to generate exponential and cosine signal.
Q.3. Write a program to scale, shift and inversion of various basic signals.
Q.4 write a matlab program to find the current values in the given circuit.
V1 = 20 V V2 = 12 V3 = 40
R1 = 18 R2 = 10 R3 = 16
R3 = 6 R5 = 15 R6 = 8
R7 = 12 R8 = 14
Q.5 Define Stem, Plot, Plot3,fplot, ezplot, linspace, grid,mesh and legend