The noise transfer function must be specified as a structure with fields "num" and "den", each a cell array of NY elemen

[fyousefi]

The noise transfer function must be specified as a structure with fields "num" and "den", each a cell array of NY elements such that num'{'k'}'/den'{'k'}' represents the noise model for k:th output. num'{'k'}' and den'{'k'}' must be of the same length and must represent stable polynomials of degree 2 or less.