重点研究了抽取技术，并将这种技术应用于数字中频系统，设计了CIC滤波器和半带滤波器；
The emphasis of research is decimation technology. Design CIC filters and Halfband filters with this theroy.
用两个半带滤波器和一个梳状滤波器来实现64倍的过采样。
Two Half Band filters and a SINC filter are designed for 64 times over sample.
剩余4倍抽取采用两级半带滤波器和升幅FIR实现。
The last 4 times decimation was achieved by two half band filters and a droop FIR.
并针对不同的滤波器长度N和频率向量的设置（传统对称或偶对称），设计出了4种全相位半带滤波器。
Moreover, corresponding to different filter length N and frequency vector setting modes(traditional symmetry or even symmetry), 4 types of all-phase half-band filters were designed.
针对宽带无线通信要求，提出了一种基于半带滤波器和CIC滤波器级联的上采样滤波器组实现方案。
A solution to implementation of digital interpolation filter for wireless communication system was presented based on half-band and CIC filters.
针对宽带无线通信要求，提出了一种基于半带滤波器和CIC滤波器级联的上采样滤波器组实现方案。
A solution to implementation of digital interpolation filter for wireless communication system was presented based on half-band and CIC filters.
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