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本文主要研究IIR数字滤波器的设计及实现。研究出由几种典型的模拟滤波器实现IIR数字滤波器的设计方法,比如:Butterworth模拟滤波器,并且采用MATLAB 7.0编程工具来具体实现。通过对IIR滤波器的具体研究,确立了MATLAB设计流程,结果证明该设计方法的可行性,并且为进一步在定点DSP硬件上的实现奠定基础。此外,本文还对在DSP上实现的一些关键问题做了简介。
This paper mainly studies the design and implementation of IIR digital filter. The design of IIR digital filter has been researched by several typical analog filters, such as Butterworth analog filter, and implemented by MATLAB 7.0 programming tool. Through the concrete study of IIR filter, the MATLAB design flow is established, the result proves the feasibility of this design method, and lays the foundation for the further realization on fixed-point DSP hardware. In addition, this article also introduces some of the key issues that are implemented on the DSP.