MATLAB design filter, can be in accordance with the design requirements very easily adjusted design parameters, greatly reduce the workload for the design, the optimization design of fir. Matlab for its strong data processing functions are widely used in engineering calculation, its rich toolbox for engineering calculation provides a convenient, use of Matlab signal processing toolbox can effectively design of digital filter, the design is simple and convenient.
This paper study on the MATLAB environment design method of FIR digital filters and realization method, and the graphical user interface design, to show that this article introduced the characteristics of filter. In infinite impulse response digital filter design, the design of simulated filter first, then the simulation - digital filter conversion, namely using impulse response not political reform and bilinear Z variation method design digital filters, the frequency conversion. Filter In finite impulse response (FIR digital filters design, discusses the characteristics of linear phase FIR filter window function method and the use of design FIR filters two questions. Filter the whole design process are according to the theoretical analysis, programming design, realization steps.
For the convenience of analysts, intuitive, and the analysis of the image, the convenience of the filter, innovative design features a graphical user interface -- filter analysis system. The whole System is divided into two interface, its content mainly includes four parts: the System (System), order (Analysis), Tool (tools), and photographs (Help).
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