Fig. 1.

Average location errors for five cases with one to five dipoles. 128-electrode configuration was used and the minimum distance among dipoles was 2 cm (Case A). The average location error is the mean of location errors of 500 samples, e.g. ${\overline{e}}_{\mathit{pos}}=(e_{\mathit{pos}}^1+\cdots +e_{\mathit{pos}}^{500})/500$, where the location error e_pos is the root mean square of the localization error for dipole positions of one sample.