Power Spectral density estimation

 What is Power Spectral Density(PSDs): In name itself, implies they are used to analyze vibration environment in frequency spectrum. They are used to quantify various vibration environment.Power spectrum reveals the existence, or the absence, of repetitive patterns and correlation structures in a signal process. These structural patterns are important in a wide range of applications such as data forecasting, signal coding, signal detection, radar, pattern recognition, and decision making systems. The most common method of spectral estimation is based on the fast Fourier transform (FFT). For many applications, FFT-based methods produce sufficiently good results. However, more advanced methods of spectral estimation can offer better frequency resolution, and less variance. Objective: One purpose of estimating the spectral density is to detect any periodicities in the data by observing peaks at the frequencies corresponding to these periodicities.Some SDE techniques assume that a sign...