该程序是一种DFT滤波器组的实现程序，通过划分频带可有效的降低计算复杂度。-The program is a program of the realization of a DFT filter banks, which can effectively reduce the computational complexity by dividing the band.

《cognitive spectrum sensing and detection using polyphase DFT filter banks》关于多相滤波一个很有用的一篇文章，大家可以参考一下。-"Cognitive spectrum sensing and detection using polyphase DFT filter banks" an article about a very useful polyphase filter, we can refer to.