Question

Write MATLAB code to plot the following waveforms

1. Signums:
   1. ???(?)
   2. ???(? − ?)
   3. ? ⋅ ???(? − ?)   

For ? and ?, choose any values that make sense.

2. Causal exponential:
   1. ?           ?(?)
   2. ? ⋅ ?     ?(? − ?).   

For ?, ?, and ?, choose any values that make sense

Answer 1

Ans)

%================MATLAB CODE===============

t=-5:0.01:5;

%=======Signums (a)=======

x1=sign(t); %sgn(t) signum function

figure

plot(t,x1,'LineWidth',2)

title('sgn(t)')

grid on

%===========(b)============

T=1;

x2=sign(t-T);

figure

plot(t,x2,'LineWidth',2)

title('sgn(t-T)')

grid on

%===========(c)============

A=2;

x3=A*sign(t-T);

figure

plot(t,x3,'LineWidth',2)

title('A*sgn(t-T)')

grid on

%=======causal exponential (a)============

a=1;

T=1;

A=2;

t=-5:0.01:5;

x4=exp(-a*t).*heaviside(t);

figure

plot(t,x4,'LineWidth',2)

title('exp(-at)*u(t)')

grid on

%=======causal exponential (b)============

x5=A*exp(-a*t).*heaviside(t-T);

figure

plot(t,x5,'LineWidth',2)

title('A*exp(-at)*u(t-T)')

grid on

%======================================

plots are