Reliable and Efficient Approach of BOLD Signal with Dual Kalman Filtering
Figure 4
Parameters estimated by joint UKF and dual UKF. The mean values in Table 1 are used as initial values in our simulation. Apart from , which grows sharply at the beginning and does not change afterwards, all the parameters obtained from dual UKF can be seen as constants. Resting oxygen extraction is the most important parameter in driving the model uncertainty [17], but simultaneous estimation of and other parameters would be impossible, as stated earlier. is a nominal mechanism to BOLD signal. Therefore and does not enter filtering.
