一种高阶线性FIR滤波器设计  

Design of a High Order Linear FIR Filter

作　　者：喻秀明 冯全源[1] YU Xiuming;FENG Quanyuan(Institute of Microelectronics,Southwest Jiaotong University,Chengdu 611756,P.R.China)

机构地区：[1]西南交通大学微电子研究所,成都611756

出　　处：《微电子学》2021年第5期685-689,共5页Microelectronics

基　　金：国家自然科学基金重大项目(62090012);国家自然科学基金重点项目(62031016,61831017);四川省科学技术重点项目(2019YFG0498,2020YFG0282,2020YFG0452,2020YFG0028)。

摘　　要：为了解决高阶线性FIR滤波器占用查找表资源过多的问题,提出了一种采用对称查找表的分布式结构。利用线性FIR滤波器系数对称的特点,设计了深度更小的对称查找表。采用时分复用技术和流水线技术,有效节约了查找表资源,提高了FIR滤波器的运行频率。在Xilinx XC5VLX110TFPGA芯片上,实现了1023阶的基于对称查找表的FIR滤波器。结果表明,相比于分段查找表结构,对称查找表结构的FIR滤波器节约了48%的Block Rom资源,提升了15%的最高时钟频率。A new distributed arithmetic architecture based on symmetric look-up tables was proposed for solving the problem that high-order linear FIR filters occupied too many look-up tables.A smaller symmetrical look-up table was designed based on the symmetry of the coefficients of linear FIR filter.Fast running filters were implemented through time-division multiplexing and pipeline technology,and the size of the look-up table was effectively reduced.On Xilinx XC5VLX110TFPGA chip,a 1023order FIR filter based on symmetric lookup table was implemented.The results showed that,compared with the segmental lookup table structure,the FIR filter with the symmetric lookup table structure saved 48%of the Block ROM resources and increased the maximum clock frequency by 15%.

关 键 词：线性FIR滤波器 分布式算法 查找表 

分 类 号：TN713[电子电信—电路与系统]