Umal-qura university

OBJECTIVES OF THE LAB

This lab aims at the understanding of:

• 
  Generating unit impulse and unit step sequences
  
• 
  Basic signal operations
  

1. 
   GENERATING UNIT IMPULSE AND UNIT STEP SEQUENCES
   

Use matlab commands zeros and ones to generate unit impulse and unit step sequences.


Example: Unit Impulse Sequence

n=‐10:10;

% unit impulse x1=[zeros(1,10) 1 zeros(1,10)];

stem(n,x1,'filled'); xlabel('sample #'); ylabel('signal amplitude'); title('Unit impulse'); axis([‐10 10 ‐1 2]);
Example: Unit Step Sequence

n= ‐10:10;

%unit step x1=[zeros(1,10) ones(1,11)];

stem(n,x1,'filled'); xlabel('sample #'); ylabel('signal amplitude'); title('Unit step');

axis([‐10 10 ‐1 2]);


TASK 1
Using ones function, plot the signum sequence over interval ‐10≤n≤10. It can be defined as:

2. 
   BASIC SIGNAL OPERATIONS
   

1. Signal Shifting

clc clear all close all

n=0:0.002:4;

x=sin(2*pi*1*n);

subplot(2,1,1); plot(n,x,'linewidth',2); title('Original Signal'); xlabel('Time'); ylabel('Signal Amplitude'); axis([‐3 4 ‐1 1]);

grid;

subplot(2,1,2); plot(n‐1,x,'linewidth',2); title('Advanced signal'); xlabel('Time'); ylabel('Signal Amplitude');

axis([‐3 4 ‐1 1]);
grid;

Task 1

Delay the original signal given in above example by 1 sec. Plot both the delayed & original signal on the same figure.

2.