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Visual Evoked Potential (VEP) is known as non-stationary signal. The noteworthy characteristic associated with VEP is; it has a very low Signal to Noise Ratio (SNR). A widely linear distortionless (WLD) filter which has been previously applied in the speech enhancement is introduced for the VEP noise reduction. The designed filter exclusively depends on the non-circularity coefficient of the non-stationary...
Noise reduction is normally carried out in time domain and works well with the real-valued signal. The reduction of noise can also be performed in frequency domain. However, the signal must be transformed into complex random variable. The widely linear distortionless (WLD) filter has already been used for the speech enhancement. The WLD filter utilizes the Short Term Fourier Transform (STFT) to transform...
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