Hi, I have a Power spectral density of an EMG signal. I want to calculate total power for different frequency ranges. (For 5-12, 15-30 and 30-60) How can I do this using matlab? Thank you very much for your time.

# Total power of PSD

Started by ●March 27, 2013

Reply by ●March 27, 20132013-03-27

Am 27.03.2013 18:32, schrieb sedab:> > I have a Power spectral density of an EMG signal. I want to calculate total > power for different frequency ranges. (For 5-12, 15-30 and 30-60) How can I > do this using matlab?Then compute the "integral" of your PSD curve over these intervals. It boils down to computing the average power spectral density in such an interval and then multiplying this by the width of the interval. average density in V^2/Hz times width in Hz equals power in V^2. Something like that.

Reply by ●March 27, 20132013-03-27

On Mar 28, 6:32�am, "sedab" <94722@dsprelated> wrote:> Hi, > > I have a Power spectral density of an EMG signal. I want to calculate total > power for different frequency ranges. (For 5-12, 15-30 and 30-60) How can I > do this using matlab? > > Thank you very much for your time.you need the area under the curve for a defined delta f

Reply by ●March 27, 20132013-03-27

On Mar 28, 6:32�am, "sedab" <94722@dsprelated> wrote:> Hi, > > I have a Power spectral density of an EMG signal. I want to calculate total > power for different frequency ranges. (For 5-12, 15-30 and 30-60) How can I > do this using matlab? > > Thank you very much for your time.a far easier way is to bandpass filter the signal and compute the variance (assuming no dc). This is the same as the average power.