How to calculate the denominator coefficient for a large number of poles?

How to calculate the denominator coefficient for a large number of poles?

Answer 1

[Sunand Agarwal]

You might want to use numden function in MATLAB to extract both the numerator and denominator coefficients.

If this doesn't help, please explain your problem statement in detail.

[Waleed Tariq]

Actually, I have a output of the causal linear shift-invariant filter and the variance of the input signal is 0.05 and the filter is an autoregressive filter. iHave to calxulae the denominator coefficients for a large number of poles and then I have to calculate the mean square error for each number of poles. Moreover, I have to use one of the formulas from "Model Order Slection Crtiteria" to calculate optimal number of poles. In the end I have to calculate again coefficients of denominator but for optimal number of poles .

[Sunand Agarwal]

You may refer to the tfdata function for extracting the denominator coefficients for transfer functions.

This might help in your use case.