An Improved Global Harmony Search Algorithm for the Identification of Nonlinear Discrete-Time Systems Based on Volterra Filter Modeling

Table 3

Nomenclatures used in Volterra filter modeling of nonlinear discrete-time system.

	The digital input signal
	The output signal of the second-order Volterra filter model (as (2))
	The output of the unknown nonlinear discrete-time system
	The measurement noise
	The sum of and
	The error signal between and