Ok so this is our assignment for college. I have no idea what this guy is asking us to do. Anyone can explain this to me in less complex english ?Don't give me the answer, just explain if you can what i need to do, and possibly how to do it.
Here's the task :
To demonstrate the effect of changing the value of N, synthesize a cosine
with 30 samples at 10 samples per period.
n = [0:29];
x = cos(2∗pi∗n/10);
Define 3 different values for N, e.g. 64, 128 and 256. Then take the
transform of x[n] for each of the 3 values that were defined. Use the abs
function to find the magnitude of the transform, as we are not concerned
with distinguishing between real and imaginary components. Normalize the
scale so that it extends from 0 to 1 − 1/N, then plot each of the transforms
one above the other. Explain how these plots differ from one another and
why.
What happens if N is the same as the number of samples in x[n]? To
find out, set N = 30. What does the resulting plot look like?
Here's the task :
To demonstrate the effect of changing the value of N, synthesize a cosine
with 30 samples at 10 samples per period.
n = [0:29];
x = cos(2∗pi∗n/10);
Define 3 different values for N, e.g. 64, 128 and 256. Then take the
transform of x[n] for each of the 3 values that were defined. Use the abs
function to find the magnitude of the transform, as we are not concerned
with distinguishing between real and imaginary components. Normalize the
scale so that it extends from 0 to 1 − 1/N, then plot each of the transforms
one above the other. Explain how these plots differ from one another and
why.
What happens if N is the same as the number of samples in x[n]? To
find out, set N = 30. What does the resulting plot look like?