基于分布式算法的FIR优化设计

摘要

To further reduce the scale of the ROM in implementing the DA ( Distributed Algorithm), this paper firstly gave an introduction about how using DA( Distributed Algorism)to implement FIR digital filter and make a comprehentive synthesis of several methods directed to reduce ROM in implementing FIR filter. Meanwhile, we put forward a comprehensive method that combines the offset binary code with decomposing ROM to implement a digital FIR with 25 taps only using half of resource compared with the traditional method. The simulation result indicated that offset binary code was used to combine with decomposing ROM can reduce ROM resource at most in implementing FIR.%为进一步降低分布式算法实现过程中使用的存储单元容量,在介绍利用分布式算法实现数字滤波器的同时,文中首先总结了几种降低ROM单元的分布式实现算法,并提出了将分解ROM方法与偏移码计算结合起来的实现技术,在此基础上实现了25阶的数字低通滤波器,资源占用量只需传统实现的一半.仿真综合结果表明,利用偏移二进制编码的分布式运算结合ROM分解技术,可以最大限度的降低实现FIR滤波器需要的ROM资源.