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This communication will explore the use of particular types of frequency domain concepts, labelled higher order spectra, to help determine the frequency response of a process. This will allow the identification of the parameters of a single input, single output (SISO) model for a process (which includes a time delay), in both open loop and closed loop environments.
O'Dwyer, Aidan :System identification using higher order spectra. Proceedings of the IT & T Conference, Letterkenny Institute of Technology, October.