Efficiently Designed Hammerstein Spline Adaptive Filter for Ocular Noise Extraction from EEG Signals
摘要
Noise extraction from electroencephalogram (EEG) signals has become indispensable in the clinical field. This paper mainly focuses on designing an efficient Hammerstein spline adaptive filter (HSAF) for the ocular noise extraction from the EEG signals. The paper claims the novelty of applying a metaheuristic algorithm for optimizing the filter taps and control points (knots) of HSAF. A recently developed evolutionary algorithm, namely, the slime mould optimizer (SMO) algorithm, has been adapted to optimize the filter taps of HSAF, and the outcomes are compared with other reported methods on same dataset. The proposed HSAF has performed better in imaginal and precision analysis for removing the ocular noise even in the low-frequency band (10–12 Hz) without any alteration in the α-component with improved signal-to-noise-ratio (SNR) of 99.108 dB, lesser mean-squared-error (MSE) value of −36.1083 dB, and mean-absolute-error (MAE) of 0.001692 dB. Further, the real-world feasibility of the proposed method is verified in hardware TMS320C6713 digital signal processor kit.