Hi

I am trying to measure the resonances of an arbitrary cavity. I use an

ultrasonic signal x to excite the cavity and try to estimate the resonances

from the cavity output (y).

x --> [cavity] -->y

I use a chirp pulse train as input (x) to excite the cavity.

http://www.mathworks.com/help/toolbox/signal/chirp.html

Chirp has a flat spectrum so in frequency domain it has a uniform frequency

response and consequently the output (y) will show the resonances of the

cavity.

Since the cavity is arbitrary, I need an "estimate" of its resonances.

question is, can I use linear prediction to estimate the poles of the

transfer function of the cavity from (y)? Because the exciataion (x- the

chirp) is not a stationary signal and I doubt if linear prediction is still

valid in my problem.

Many thanks

Farzaneh