MULTIVARIABLE SYSTEM IDENTIFICATION BY PENCIL-OF-FUNCTIONS METHOD.

For a multi-input-multi-output system, the transfer function matrix parameters from the recorded multivariable input and output data were determined. The measured outputs may represent the responses obtained at multiple receivers from a scatterer or they may be the responses of a network at several nodes. Because of the intrinsic nature of real physical systems, the problem is cast as a common-mode (i. e. , common denominator) identification problem. The transfer function matrix parameters are estimated using a digital signal processing technique, namely, the pencil-of-functions technique.