FIR Filter Design. FIR filter design using the Fourier series method using different windowing techniques such as Rectangular, Hanning, Hamming & Blackman.

短时傅立叶变化代码,短时傅立叶变换在信号处理中运用十分广泛。大家都会遇到这个问题。-The application of short-time Fourier transform in signal processing,Everyone will encounter this problem.

快速傅里叶算法源代码，通过此算法可以快速提取某一信号的工频以及各次谐波-Fast Fourier algorithm source code, by this algorithm can quickly extract a signal frequency and each harmonic

The sine wave is important in physics because it retains its wave shape when added to another sine wave of the same frequency and arbitrary phase and magnitude. It is the only periodic waveform that has this property. This property leads to its impor