基于改进的DA算法实现高阶FIR滤波器  

Realization of high-order FIR filter based on improved DA algorithm

作　　者：王哲[1] 周前能[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《现代电子技术》2014年第4期8-12,共5页Modern Electronics Technique

摘　　要：介绍了几种应用于高阶FIR滤波器的算法,着重介绍DA算法,该算法主要基于LUT形式,从根本上减少了乘法器资源的消耗,提高了系统的实时性。并以此为基础介绍了几种改进的算法,分别是基于LUT分解、基于OBC编码以及基于双向选择器的DA改进算法,这些算法都从不同程度上降低了资源的使用,提高了信号处理速度,降低了系统复杂性。最后,对FIR滤波器的改进算法进行了全面的分析比较和仿真,仿真结果均正确并且符合设计要求。Several kinds of algorithms applied to high-order FIR filter are introduced,among which the DA algorithm is em-phatically introduced. The algorithm mainly based on the form of LUT reduced the resource consumption of multiplier radically and improved the real-time performance of the system. On this basis,several kinds of improved algorithms are presented in this paper. They are the improved DA algorithms,respectively based on LUT decomposition,OBC coding and two-way selector. They improved the speed of signal processing and reduced the system complexity. The comprehensive analysis,comparison and simulation for the improved DA algorithms applied to FIR filter are carried out. The results of simulation are correct and meet the design requirements.

关 键 词：DA算法 FIR滤波器 LUT分解 OBC编码 双向选择器 

分 类 号：TN911-34[电子电信—通信与信息系统]