User talk:Thedean515

Notes on Modern Spectral Estimation
This article is based on a few well known research work done in the few decades.

The most foundamental spectral estimation method is using Fourier transform method, it then developed with a faster algorithm called Fast Fourier tranform method (FFT). I don't why but we don't use FFT directly, instead we use the autocovariance function.


 * $$R_{xx}=E[x(t+\tau)x^*(t)]$$

We then apply Fourier transform

Haha this is $$\sum_{i=0}^N = \pi$$