中文说明：
说明：采用多相滤波结构，可利用多个阶数较低的滤波来实现原本阶数较高的滤波，而且每个分支滤波器处理的数据速率仅为原数据速率的I/D，这为工程上高速率实时信号处理提供了实现途径。
English Description：
_ description: using polyphase filter structure, can use multiple low filtering order to achieve high order filter, and each branch filter processing data rate was only about the data rate of the I/D, this provides engineering on high speed real-time signal processing.