# what is probability density function (PDF) of periodic signal

Anybody knows what is the best pdf for periodic signal ?

I have signal with $$480$$ samples $$\left(16000*0.03=480\right)$$ but I could not find the exact pdf for that. sometimes it appear like 2 mixed Gaussian.

• What is the source of randomness; the amplitude, the phase, or offset? – Emre Apr 21 '13 at 7:35
• Amplitude vs time – Ali Bodaghi Apr 22 '13 at 1:08
• Related: dsp.stackexchange.com/q/184/29 – endolith Apr 22 '13 at 17:43