时变CIC滤波器的FPGA实现方法研究

Study on Implementation of Time Varying CIC Filter Based on FPGA

首先介绍了时变CIC滤波器的原理,然后给出了降低硬件实现复杂性的等效变换方法,同时分析了该采样率转换器的转换精度及参数选取对滤波器性能的影响。最后,通过Quartus软件仿真和应用实例,验证了该方法的有效性。

First, the principle of time-varying CIC filter is introduced in this paper. Then, some equivalent transformation methods are proposed to reduce the realization complexity in hardware. At the same time, the conversion precision of the sample rate converters is analyzed and the effect of some parameters for specification of filters is discussed. Finally, simulation is carried out by using Quartus Ⅱ. The application instance validates the efficiency of this method.