1.Z=1+i*5 (in quadratic form),
2.s(t)=Zexp(iw*t), (i'm multiplying two signals)
now, i want to take second order derivative, yes i know the usual way like this, Equation
but is there any other alternative form to find 2nd order derivative?,
and by doing that i want to extract my original signal ("z", which's given above ) does any one have idea about this ?
I tried this way it's worked but i want reduce it more complex.
After double derivative i will calculate instantaneous angular frequency like this
W=(mean((y'')^2)/mean((s(t))^2)) and i will get result as
I=-2*mean[(s(t)*sin(w*t))] this both I and Q are our original signal