Patent ID: 7143015

Claim:
A method of determining characteristics of a system H(z) having multiple inputs, the method comprising: applying to the system a series of vector probe input signal sets, each vector probe input signal set being formed using a column of a matrix V and a scalar input signal; measuring a response signal of the system; determining a single-input system {overscore (F)} m (z) by considering an approximate relationship where a z-transform of the scalar input signal applied to the single-input system yields a z-transform of the response signal of the system; determining a multiple-input system F(z) as the system whose m-th column is the determined single-input system {overscore (F)} m (z); obtaining a right-matrix-inverse of the matrix V; and multiplying the multiple-input system F(z) by the right-matrix-inverse of the matrix V to determine the characteristics of the system H(z).