新型CIC滤波器的优化设计及其仿真  

Optimized Design of a New CIC Filter and Its Simulation

作　　者：赵玉磊[1] 张效义[1] 

机构地区：[1]解放军信息工程大学通信工程系,河南郑州450002

出　　处：《计算机仿真》2008年第1期324-327,339,共5页Computer Simulation

摘　　要：CIC滤波器的优点在于非常容易用硬件实现,然而它具有一对矛盾一阻带衰减和通带波动。文中针对由这对矛盾引起的通频带过窄的不足,提出了一种适用于DVB-T系统接收机的新型CIC滤波器的设计方法。该方法结合典型的补偿滤波器,设计了一种全局可调的多级CIC滤波器,统一优化滤波器中的参数,抽象出了此问题的数学模型,并采用网格搜索法进行求解。最后用Matlab6.5和QuartusⅡ5.1平台进行了联合仿真,并和其它设计方法的仿真结果进行了对比。仿真结果表明新型CIC滤波器在满足阻带衰减指标的要求下,最小化了通带波动,达到了更优异的性能,同时也证明了硬件电路的正确性和有效性。The attraction of the Cascaded Integrator Comb filter lies in its economical implementation, but it also has drawbacks stop - band attenuation and pass - band ripples. In this paper, the narrow pass - band problem resulted from the drawbacks is considered. Then it introduces a new method of designing CIC filter used in the receiver end of DVB - T system. This new method gives a globally tuned CIC filter by optimizing the parameters of the new CIC filter based on the typical compensating filter. Then it abstracts and solves the mathematic model for this problem by a grid search approach. At last a joint simulation based on combination of Matlab6.5 and Quartus Ⅱ5.1 is present, and the simulation results are compared with that of other design methods. The experiment results show that it not only satisfies the demand of stop - band attenuation, but also minimizes the pass - band ripples, so it achieves the better results. And it verifies the efficient design and the correct circuit.

关 键 词：级联积分梳状滤波器 联合仿真 超高速集线电路硬件描述语言 数学模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TN911.72[自动化与计算机技术—计算机科学与技术]