Figure 5.

(a) Shows the effect of adding different synthetic PL levels (1, 5, and 10%) on the iEEG signal PSD for each subject (raw signal with no synthetic PL shown for comparison). The previous value replacement was used for signal reconstruction. (b) Shows the effect of the amplifier's sampling frequency in recovering the missing packets for synthetic 10% PL level. For each subject, the left plot shows the signal at the original sampling frequency (2 kHz) of the clinical systems, and the right plot shows the down-sampled signal to 1 kHz. (c) Effect of different interpolation methods on recovering the iEEG signal (down-sampled to 1 kHz) for each subject. The PSD of the reconstructed signal with the previous value replacement reached − 11 dB at 500 Hz, while the raw data PSD reached − 33 dB at 500 Hz for P1. For P2, the PSDs of the reconstructed signal with the previous value replacement and raw data were estimated at − 23 dB and − 28 dB, respectively, at 500 Hz. The previous value replacement reconstructed signal PSD reached − 24 dB while the raw data reached − 29 dB at 500 Hz in P3.