首先介绍了内插理论和CIC 滤波器原理,重点给出了CIC 滤波器设计方法,并分析了CIC 滤波器级联级数

和滤波器阶数的选取对通带衰减和旁瓣抑制的影响,仿真结果验证了设计方法的有效性和可行性。-First introduced the theory and CIC interpolation filter, the focus is given CIC filter design methods, and analyzes the CIC filter and filter cascading series of the selected order of the pass-band attenuation and the effects of sidelobe suppression, The simulation results show the design method is effective and feasible.