Problem Definition
Many researchers are working on the Brain computer interfacing. They work on different methods of BCI. The analysis of EEG signal is doing by using Fourier transform, Wavelet transform. FFT is good method of analyzing the EEG signal. For the studying FFT of signal firstly study of periodic signal is important because the knowing the actual Theme of FFT. Periodic signals means the period is given to the signal. These signals are sine wave, square wave, triangular and swatooth waves. After that by using FFT study the EEG signal. FFT of EEG signal shows the number of frequency components present in the signal. In the different frequency bands are present such that delta, theta, alpha, beta. For separating these frequency bands band pass filters are designed. Power spectrum density has calculated by taking mean amplitudes present in the frequency bands for each channel. Calculate the frequency spectrum density for all bands, from that PSD showing the dominant part on the brain is possib...