一种基于CIC和FIR的低功耗数字滤波器设计  

A low power digital filter solution based on CIC filter and FIR filter

作　　者：孔阳[1] 武杰[1] 宋洪治[1] 万娟[1] 

机构地区：[1]中国科学技术大学近代物理系物理电子学安徽省重点实验室,安徽合肥230026

出　　处：《中国科学技术大学学报》2011年第10期883-889,共7页JUSTC

基　　金：国家重大科技专项(2008ZX05008-005-004)资助

摘　　要：针对地震信号采集系统中的滤波器设计问题,提出一种基于CIC滤波器和FIR滤波器的低功耗数字滤波解决方案.系统由四级前端CIC滤波器、三级前端FIR滤波器和一级离线均衡FIR滤波器构成,以满足地震信号采集系统和地质勘探的需求.对各级滤波器和整个系统的幅频特性和相频特性进行了研究,并通过仿真完成性能验证,结果显示此低功耗数字滤波系统的性能完全能够满足实际需求;将此低功耗数字滤波系统与当前业界的片上数字滤波解决方案进行对比,证明了此低功耗数字滤波系统能够大幅减少总运算量和前端功耗运算量.A low power digital filter solution was proposed to solve data decimation and signal filtering problem in seismic signal acquisition equipment.The filter system is constructed with four front-end CIC filters,three front-end FIR filters and a back-end FIR filter to meet the requirements of acquisition equipment and geological analysis.The frequency and phase responses of each filter and the whole low power digital filter system are analyzed.The simulation proves that the proposed solution can work well in seismic signal acquisition equipment.The low power digital filter system is also compared to the current on-chip digital filter solution currently in use in the industry in total calculation quantity and front-end calculation quantity.The results show that the proposed solution can radically reduce both total calculation quantity and front-end calculation quantity.

关 键 词：低功耗数据采集系统 地震信号处理 CIC滤波器 FIR滤波器 

分 类 号：TN911.72[电子电信—通信与信息系统]