说明：  书名是《快速傅立叶变换浅谈》，虽然是国人出版的，但阅读后感觉还是不错的，书后面还将FFT写成BASIC程序。只是PDF扫描的有点淡，要耐心点阅读。
(Entitled "Fast Fourier Transform Talking", is published by the people, but still feel good read, the back of the book will also FFT written in BASIC programs. Only PDF scan a bit short, patience to read.)