Adding high frequency noise..
28 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
How can we add a high frequency noise to a sinusodial signal in matlab.Is there any process to generate a high frequency noise in matlab.
2 commentaires
pietro
le 28 Avr 2014
What is the amplitude of the noise? do you need any special noise properties such as: guassian noise?
Réponses (2)
Image Analyst
le 28 Avr 2014
Hint: one way to do it is to take the fft of your signal and add random numbers ONLY to frequencies higher than whatever you consider "high" to be. And there will be no noise at lower frequencies. Then, after you've added noise, inverse Fourier transform to get back to the "x" (spatial) domain.
5 commentaires
Daniel Russell
le 15 Déc 2021
Great idea, that worked perfectly (doing image processing demo). Thanks.
Jan
le 28 Avr 2014
Yes. You can create any kind of noise in Matlab and add it to your signal.
For a more detailed help, please explain the details of your problem.
3 commentaires
Jan
le 3 Mai 2014
@Marben: Please provide any information. Do you need a general "high" frequency, than use simply rand(). If you have a defined frequency spectrum, explain it with all required details.
Prajan Pradhan
le 28 Avr 2015
If I need to insert noise of frequency over 20 kHz to an audio signal. How can I do that?
Voir également
Catégories
En savoir plus sur Signal Generation and Preprocessing dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!