Introduction - If you have any usage issues, please Google them yourself
On the Fourier transform, both the books or the Internet can easily be found on the Fourier transform of the descriptions, but mostly some trick of the article, too abstract, do some people read the formula on the daunting list, make it difficult to can be understood from the Emotionally, this document is written in very simple and obvious, there are seven chapters devoted to the greatest depth and the Fourier transform of discrete signals, there are enlightened sense of seeing, in which the understanding I gained out with you share the hope that many were confused friend Fourier transform can be a start.