基于DSP的FIR滤波器设计中新型快速算法  

New fast algorithm in DSP FIR filter design

作　　者：杨诚[1] 马永杰[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《计算机应用》2009年第12期3221-3223,共3页journal of Computer Applications

基　　金：甘肃省自然基金资助项目(096RJZA115)

摘　　要：针对DSP领域中使用奇数个点的FIR冲击响应设计滤波器时,只能使用效率较低的MAC指令的问题,提出了一种新的快速算法。通过理论分析推导出奇数个点FIR滤波器冲击响应的一种新表达式,根据该表达式设计了基于高效的FIRS指令为中心的算法。仿真表明,新算法的计算时间和传统算法相比大幅减少,可灵活地应用于实时性要求较高的高阶DSPFIR各种类型滤波器的设计中。A new fast algorithm was proposed in order to solve the problem that the FIR impulse of odd points can only use inefficient MAC instruction in DSP FIR filter＇s design. A new expression of FIR filter impulse of odd points was deduced through theoretical analysis and a new fast algorithm based on efficient FIRS instruction was offered in case of this new expression. Comparison with traditional algorithm was implemented through computer simulation, which demonstrates computation time of program can be reduced efficiently by employing this new algorithm which can be flexibly applied in all kinds of high order FIR filter designs in real-time field.

关 键 词：数字信号处理 FIR滤波器 CCS 计算时间 快速算法 

分 类 号：TN911.72[电子电信—通信与信息系统]