带残余补偿的外推冲激响应低成本FIR滤波器实现  

Implementation of low-cost FIR digital filters based on extrapolated impulse response with residual compensation

作　　者：叶丰[1] 徐红[2] 黄朝耿[3] 

机构地区：[1]杭州国芯科技股份有限公司,浙江杭州310012 [2]浙江工业大学信息工程学院,浙江杭州310023 [3]浙江财经大学信息学院,浙江杭州310018

出　　处：《电子技术应用》2015年第6期42-44,50,共4页Application of Electronic Technique

摘　　要：基于带残余补偿的外推冲激响应设计技术,利用硬件描述语言编程在集成电路上对FIR数字滤波器进行了综合。该技术利用冲激响应的准周期特性近似滤波器系数,有效降低了FIR滤波器常系数乘法的复杂度,并通过残余补偿降低滤波器阶数,同时应用子项共享技术进一步减少加法器个数。综合结果表明所提方法可以有效节省高阶FIR滤波器硬件资源的消耗,适用于低成本数字系统设计。Filter impulse responses are quasi-periodic and filter coefficients can be approximated by extrapolation techniques. In this paper, a hardware technique for implementing FIR filters based on extrapolated impulse response is proposed to achieve low hardware cost on VLSI. Residual compensation can perfectly restore filter coefficients and the subexpression space technology can ef- fectively reduce the number of adders in muhiplierless FIR filters. The results of hardware synthesis show that the proposed method can efficiently save hardware resources consumption applicable to low-cost design of digital systems.

关 键 词：FIR数字滤波器 外推冲激响应 子项共享 ASIC FPGA 

分 类 号：TN713[电子电信—电路与系统]