[Matlab] using rayleighchan.m

[yongs90]

Homework Statement

Anybody knows how to use rayleighchan.m to accomplished the task given in Questions.pdf, the coding use to solve Questions.pdf is given in Matlab Code.doc. After running the code in Matlab Code.doc in Matlab programme the plot obtained is as shown in Plot.jpg

Homework Equations

View attachment Matlab Code.doc
View attachment Questions.PDF

The Attempt at a Solution

n=sqrt(0.5)*randn(1,100001)+ j*sqrt(0.5)*randn(1,100001);
chan = rayleighchan(0.1e-3,100);
a=filter(chan,n);
[c,lags]=xcov(a,'coeff');
lags_new=0.1e-3*lags;

figure(1)
plot(lags,real(c),'--r')

grid on
xlabel('Time Delay (s)')
ylabel('Normalised Autocorrelation')
legend('Simulation')


However, the plotted graph given is not right. Anybody knows how i can check the impulse response of chan (variable name) so that i can compare it with hw_norm (variable name) in Matlab Code.doc??

 

[KataKoniK]

Hi there,

To check the impulse response of the chan variable, you can use the "impz" function in MATLAB. This function calculates and plots the impulse response of a system.

You can use it like this:

impz(chan)

This will plot the impulse response of the chan variable, which you can then compare with the hw_norm variable in the Matlab Code.doc.

Also, make sure that the variables used in the code (such as the sampling rate and number of samples) match those given in Questions.pdf.

I hope this helps! Let me know if you have any further questions. Good luck!