Denoising Audio Signal of Doppler

1 次查看（过去 30 天）
Freeplot
Freeplot 2020-4-4
评论： Freeplot 2020-4-4
Hi there! Is it possible to remove signal below a defined power-threshold? For example all signals below the power of 5.
  2 个评论
Image Analyst
Image Analyst 2020-4-4
Do you want to remove a signal if ALL of the elements are below 5? Or if the MEAN or median of all the elements is below 5?
Freeplot
Freeplot 2020-4-4
Is it possible to continuously calculate the mean/median value over a small section and remove the power below a certain threshold?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Ameer Hamza
Ameer Hamza 2020-4-4
It depends on what do you mean by "remove." If you just don't want to skip those frequency values than do something like this
f = [f1 f2 f3 ..]; % vector of frequency values
s = [s1 s2 s3 ..]; % vector of power signal
mask = s > 5; % find the signal values greater than 5
plot(f(mask), s(mask));
For a specific solution for your signals, please share details of how the signal is stored or share the signals in a mat file.
  1 个评论
Freeplot
Freeplot 2020-4-4
So I have an audio file and I want to remove/reduce the noise. The goal is to get a signal like in the image below:
First I designed a bandpass-filter and then I found out that the noisy signals have lower power than the doppler frequencies. So I want to reduce lower power signal with setting a threshold. In the following picture you can see the noisy singal in the spectrogram, which I want to reduce.
Thanks!

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Detection, Range and Doppler Estimation 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by