s2y.m

mimo系统的matlab仿真程序

%MATLAB function s2y.m converts a network's generalized 
%scattering matrix, S, into the appertaining admittance
%matrix, Y.
%The function is called up by Y = s2y(Z0, S). It needs
%as its input arguments not only the elements of an
%S matrix, but also those of a normalizing reference
%impedance matrix, Z0.
%Z0 is a diagonal matrix whose elements are either
%real-valued (e.g., all diagonal elements
%are Z0 = 50 ohms) or complex-valued, i.e., with 
%a capacitive or inductive reactance term.

function[Y] = s2y(Z0, S)

D0= inv(sqrtm(Z0));
U = diag(ones(length(Z0),1));
Y = sqrtm(Z0)*inv(conj(Z0)+(S*Z0))*(U-S)*D0;