DFT源码，本程序是为了研究FFT和DFT 的具体原理做的实验，有详细的注解，删去注解即可运行的到结果，适合学习信号处理的朋友深入理解dft-DFT source, this procedure is to study the specific principle of FFT and DFT experiment, has detailed notes, delete annotations can run to the result, is suitable for the friends understand DFT learning signal processing