Investigation of feature extraction methods for EEG signal processing

Today, in view of human on the computer in most fields, communication has to be documented between human and computer to farther to be done by keyboard or mouse, like brain computer interface (BCI) technique. Since the brain is a very complicated and accurate device, signals emitted from it are different. on that, the signals classed into several types like Electroencephalography (EEG), the cheaper and easiest to use, and from this point, the (EEG) was chosen in this research. To be able to use the (EEG) for BCI technique we need to several steps for signal processing, and the most important step in this process is feature extraction technique, as for feature extraction technique, it can be done by a variety types of methods like Fast Fourier Transform (FFT), Wavelet Transform (WT), Eigenvectors, Time-Frequency Distributions, and Autoregressive Method(AR). In this thesis, we explained what is brain computer interface and for what it's important uses and how we can use, and also we have explained (EEG) signals and feature extraction methods uses to (BCI).