How can i make a smoothed envelope of my complex (random) signal?

8 次查看（过去 30 天）
Stijn Hillenius
Stijn Hillenius 2017-8-29
评论： Stijn Hillenius 2017-9-5
I would like to plot a envelope over my random signal (complex). My matlab does not support the function 'envelope'. Any ideas how I can do this?
Thanks in advanced.
stijn
  4 个评论
显示 2更早的评论
Adam
Adam 2017-8-29
Smoothing is something of a black art and depends entirely on your data, what you want to get from it, etc, etc.
You could just slap a length 5 mean filter over your envelope to smooth it, but that is very aggressive.
Or you can use a Savitzky-Golay filter
doc sgolay
to do some post smoothing. That requires a lot of parameterisation though which again depends on just how smooth you want it vs how much of your data you want to retain.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2017-8-29
The envelope (link) function uses the absolute value of the hilbert (link) function. Use that instead.
For more information, see Envelope Extraction Using the Analytic Signal (link).

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Smoothing and Denoising 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by