146 Practical Biomedical Signal Analysis Using MATLAB
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way it was possible to find a filter extracting single ERP. However, the method re-
lied on average ERP in the identification of ARMA model, and as such was not free
from the assumptions pointed out in Sect. 4.1.7.1.1. A similar approach was pre-
sented in [von Spreckelsen and Bromm, 1988]. The method relies on the assumption
that the measured activity can be separated into its evoked and spontaneous parts.
A compound state-space model trying to incorporate the observable properties of
both parts is formulated on the basis of additivity of the two components. Within this
model, spontaneous activity is described as an autoregressive process, while the EP
is modeled by an impulse response of a para ...