| 二维滤波器分布式算法结构的改进与实现 |
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| 引用本文： | 凌春丽,刘云飞,姜黎黎,李湘云.二维滤波器分布式算法结构的改进与实现[J].中北大学学报,2012(2):154-158. |
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| 作者姓名： | 凌春丽 刘云飞 姜黎黎 李湘云 |
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| 作者单位： | 南京林业大学信息科学技术学院 |
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| 基金项目： | 江苏省第七批“六大人才高峰”项目(DZXX-149) |
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| 摘 要： | 针对数字滤波器对现场可编程门阵列(FPGA)的资源利用率过低的现状,对Meher等人提出的二维分布式有限长单位冲激响应(FIR)滤波器结构进行了改进,增加了延时模块,用二进制位权乘法(*2n)替代移位相加结构.提出了基于二维分布式算法的两种设计结构:"延时型"和"改进型",并且应用FPGA实现了这两种结构.根据"改进型"和"延时型"两种结构分别设计了3,7,15,31,63阶Ⅱ型线性FIR滤波器.为验证"改进型"FIR滤波器的设计效果,应用Altera DE2开发板及其配套的AD/DA子板进行测试,结果显示:设计好的滤波器完全滤除了通带外信号,实现了带通滤波的目标.
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| 关 键 词： | FIR滤波器 二维分布式算法 FPGA |
Realization and Improvement of Two-Dimensional Filter Using Distributed Arithmetic Architecture |
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| LING Chun-li,LIU Yun-fei,JIANG Li-li,LI Xiang-yun.Realization and Improvement of Two-Dimensional Filter Using Distributed Arithmetic Architecture[J].Journal of North University of China,2012(2):154-158. |
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| Authors: | LING Chun-li LIU Yun-fei JIANG Li-li LI Xiang-yun |
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| Affiliation: | (College of Information Science and Technology,Nanjin Forestry University,Nanjing 210037,China) |
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| Abstract: | The resource utilization of digital filters is low by using FPGA.Based on the two-dimensional(2-D) distributed structure of FIR filter presented by Meher,some improvements were made,included adding delay modules and binary weight multiplication(*2n)to replace shift and addition structure.Two structures,"time-delaying type" and "improvement type",were designed and implemented on FPGA with orders of 3,7,15,31,63 respectively.The Altera DE2 and AD/DA were used to test the "improvement type".The experimental results illustrated that the feasibility of the improved filter. |
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| Keywords: | FIR filter two-dimensional distributed arithmetic FPGA |
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