宽带通信系统数字插值滤波器组设计

Design of Digital Interpolation Filter for Wideband Communications

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。在半带滤波器浮点到定点量化过程中,提出了一种系数量化优化算法。通过仿真,验证了在相同的量化位数下,相对于传统的系数量化方法,增加了整个滤波器组的阻带衰减。

A solution to implementation of digital interpolation filter for wireless communication system was presented based on half-band and CIC filters.A novel optimal quantization method for digital filter coefficient was proposed in the design phase of coefficient quantization.Simulation showed that the novel optimal quantization method has obvious advantages over the conventional quantization method in the sense of out-of-band attenuation.