Adding high frequency noise..
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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 件のコメント
pietro
2014 年 4 月 28 日
What is the amplitude of the noise? do you need any special noise properties such as: guassian noise?
回答 (2 件)
Image Analyst
2014 年 4 月 28 日
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 件のコメント
Daniel Russell
2021 年 12 月 15 日
Great idea, that worked perfectly (doing image processing demo). Thanks.
Jan
2014 年 4 月 28 日
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 件のコメント
Jan
2014 年 5 月 3 日
@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
2015 年 4 月 28 日
If I need to insert noise of frequency over 20 kHz to an audio signal. How can I do that?
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