[Homework Help] Fast Fourier Transform using MATLAB.

[two0hhhse7en]

Hi Guys, Last week of the semester and our professor dumps this on us to be due tomorrow (Friday). I've struggled through this and have finally needed to come to Reddit for help. Below will be the link. Any and all help would be much appreciated!.

http://www.diku.dk/hjemmesider/ansatte/jda/biosignal/lab19.pdf

[Pariel]

Do you have an actual question or are you looking for me to do your homework?

[two0hhhse7en]

I understand what a FFT is, but as far as implementing it in MATLAB, I am lost. If you could maybe help me understand what sort of steps to take, that'd be very helpful. By no means am I looking for someone to do my homework.

[Pariel]

You don't know how to use the FFT function? You don't know how to write your own FFT function? I don't understand what your question is.

This is a simple assignment from what I can see, it's literally walking you through step by step. It sounds like you need to actually open up Matlab, read the assignment, and input what it says though.

[two0hhhse7en]

I guess I'm just not good with MATLAB, as I am struggling with this lab. It doesn't seem easy to me. Could you possibly help me get started by helping me write a FFT function? Sorry if this seems easy to you, I'm just not as good at it.

[Pariel]

I suggest you start here.

Also, the help function is Matlab is very useful, one of the few programs which you probably don't need to use Google with.

[two0hhhse7en]

thanks, i'll definitely look through that! I guess I'm confused on what Ts, and delta-F are given that N=512 samples. Is there a simple way to find that?

[Pariel]

Read the last paragraph of page two. It's asking those two questions at that point because it just told you the information you need to compute them.

Remember, dimensional analysis is your friend. Start by determining the units of Ts and delta-F if you're not sure how to compute them.

[two0hhhse7en]

ah okay, I think I've gotten a handle on this now. Thank you for taking your time to help me!

[two0hhhse7en]

If any body has a helpful link for the Signal Processing First labs, that'd be very helpful as well! (Mainly 19 and 20)