一种FIR数字滤波器的快速算法及DSP实现  

A fast algorithm for FIR digital filters and DSP implementation

作　　者：赵秀鸟[1] 仲佳嘉 

机构地区：[1]江西理工大学应用科学学院,江西赣州341000 [2]江西赣州供电公司通讯中心,江西赣州341000

出　　处：《数字技术与应用》2011年第6期131-132,135,共3页Digital Technology & Application

摘　　要：FIR数字滤波器本质上是一种线性卷积的运算,当数字滤波器的阶次N很大时,计算量很大,计算速度很慢,达不到系统对实时性的要求,并且当系统要求实现任意幅度线性相位滤波器时,DSP系统只能用效率较低的MAC指令实现,这两点无疑对系统的实时性能大大降低。本文针对这两点分别提出了改进方法。通过实验仿真表明,改进后算法的运效率和传统算法相比大幅减小,可灵活应用于实时性要求较高的高阶DSP FIR各类型滤波器的设计中。FIR digital filter is essentially a kind of linear convolution operation,when the order of the digital filter N is large,the calculation is large,the calculation speed is very slow,not reach the requirements of real-time system.And when the system requirements of an arbitrary amplitude linear phase filter,DSP system can only achieve less efficient MAC instruction,these two real-time performance of the system will undoubtedly greatly reduced.In this paper,these two are an improved method.The simulation shows that the improved algorithm of the operational efficiency and significantly reduced compared with traditional methods can be flexibly applied in real-time requirements of all types with higher order DSP FIR filter design.

关 键 词：数字滤波器 FIR滤波器 实时性 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]