How to optimize Spectrogram parameters

3 次查看（过去 30 天）

Müller, Fabian 2017-1-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/321150-how-to-optimize-spectrogram-parameters

评论： Nikunj Kothari 2017-1-30

TD_Sig.txt

Hi, im trying to use the spectrogram function. Could you help me setting the correct parameters?

I have a signal of where frequency ramps occur every ~20ms. I recorded 1s of the signal The Sampling frequency is ~200kHz The frequency range which is interesting to me is ~3-7kHz (as seen below)

Currently my parameters are: spectrogram(b,kaiser(600,0.1),360,3800,Fs,'yaxis'); How can i improve the resultion?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Nikunj Kothari 2017-1-30

Spectrogram/ STFT would have a fixed window for all time-frequency analysis, so it would depend on what resolution you are looking for. If you need a better time resolution, use a smaller window, or if you require better frequency resolution, than use a larger window.

Wavelets are meant to overcome this fixed width analysis using scale.

请先登录，再进行评论。

请先登录，再回答此问题。