tf2sos

Parameters

b:

matrix of real numbers

a:

matrix of real numbers

Description

This is an Octave function. This function converts direct-form filter coefficients to series second-order sections. The input parameters b and a are vectors specifying the digital filter H(z) = B(z)/A(z). The output is the sos matrix and the overall gain. If there is only one output argument, the overall filter gain is applied to the first second-order section in the sos matrix.

Examples

tf2sos([1,2,3,4,5,6],2) ans = 0.50000 0.80579 1.07239 1.00000 0.00000 0.00000 1.00000 -1.10337 1.87524 1.00000 0.00000 0.00000 1.00000 1.49180 -0.00000 1.00000 0.00000 0.00000