基于外推补偿技术改进结构的低成本FIR滤波器实现  

Implementation of low-cost FIR digital filters based on the new structures of extrapolation technique with residual compensation

作　　者：徐红[1] 叶丰[2] 黄朝耿[3] 

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

出　　处：《电子技术应用》2017年第5期52-54,59,共4页Application of Electronic Technique

摘　　要：外推补偿技术利用FIR滤波器冲激响应的准周期特性进行系数外推,并将近似误差补偿回去,从而有效降低了多常系数乘法的复杂度,但延时链的增加是其固有特性,3种改进结构通过改变延时链位置来减小其位宽。综合结果表明,改变输入端延时链位置的改进结构能够进一步降低FIR滤波器的硬件实现成本,具有较好的实用性。The extrapolation technique with residual compensation utilizes the quasi-periodic nature of FIR filter impulse response to reduce the complexity of multiple constants multiplication, but the extra delay chains are inherent in the extrapolated impulse re- sponse structure. The three new extrapolated impulse response structures by changing the positions of extra delay chains in order to reduce the bit-width are proposed. Numerical examples are presented to demonstrate that one of the proposed new structures can efficiently save hardware resources on VLSI for some kinds of FIR filters, and applicable to low-cost design of digital systems.

关 键 词：FIR数字滤波器 外推冲激响应 残余补偿 延时链 ASIC 

分 类 号：TN713[电子电信—电路与系统]