MATLAB Answers

How to analyze signal and make proper filter?

1 view (last 30 days)
fer jozef
fer jozef on 10 Jan 2021
Edited: Birdman on 13 Jan 2021
I don't know how to analyze this signal and use proper filter for it. I work in matlab, function sptool. I don't know how to identify modulation pulse length, characteristic interval length, modulation signal frequency, carrier signal, modulation signal type, modulation type. Also, I don't know how to do time analyzation and power analyzation. Signal15.mat is the file
  4 Comments
fer jozef
fer jozef on 12 Jan 2021
Oh, i am just testing it, but i don't know what type of modulation it could be. I wonder, if it is not FM, but i could be PSK too.

Sign in to comment.

Answers (1)

Birdman
Birdman on 13 Jan 2021
Edited: Birdman on 13 Jan 2021
If you want to have a starting point, following code basically takes the psd of the signal, so that you will be able to obtain the frequency characteristics of your signal:
h1=spectrum.welch;
set(h1,'Windowname','Hann');
Fs=10000;%sampling frequency of your signal
set(h1,'OverlapPercent','66.7');
set(h1,'SegmentLength','512');
myPsd=psd(h1,simout-mean(simout),'Fs',Fs);
semilogx(myPsd.Frequencies,myPsd.Data);xlabel('Hz');
After this, you can apply the necessary filter or do any kind of operation based on your need.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!