Question

a. A digital signal x(n) is defined as x(n)=u(n+5)-u(n-5)

Calculate the signal x1(n)=x(-2n-6) by direct method, represent the signal in sequence form and sketch the signal.
b. By performing combination of time shifting and time scaling of x(n) how x1(n) can be generated? Plot the waveforms in matlab for each step.

Answer 1

Matlab Code:

n=-10:1:10;

step1=[zeros(1,5),ones(1,16)];

step2=[zeros(1,15),ones(1,6)];

X=step1-step2;

Rest of the steps in images.

All the Best