信号处理的几种算法，都经过调试成功后的，包括FFT，IRFFT，DFT，R2FFT,SRFFT,R2FFT.-signal processing,including FFT,IRFFT,DFT,R2FFT,SRFFT,and so on

实现实序列的快速傅立叶变换 绝对正确 效率较高-The fast Fourier transform real sequence absolutely correct efficient

计算共轭对称复序列的快速傅里叶反变换，其变换结果是实数。-Symmetric complex conjugate calculation sequence of the fast Fourier inverse transform, the transformed result is a real number.