M. Shafiee et M. Razzaghi, ON THE SOLUTION OF THE COVARIANCE-MATRIX DIFFERENTIAL-EQUATION FOR SINGULAR SYSTEMS, International journal of computer mathematics, 68(3-4), 1998, pp. 337-343
State space formulation for singular linear stationary random inputs a
re presented. A covariance matrix differential equation is derived and
a new technique for solving this equation using Kronecker product is
included. An example is provided to illustrate the applicability of th
e proposed method.