Abstract
Digital filter is a basic component of the digital signal processing. Designing the filter is significant in the digital signal processing. FIR filter is a basic process unit which is widely used in digital signal. Comparing hardware method, by the way of software, the aim of electric filter can be realized through changing its parameters. FIR digital filter is applied extensively in engineering and the way of window functiong designing FIR digital filter is the typical design method. Taking window-function for example, this paper introduces the design idea of FIR electric filter based on MATLAB program . There a few window-function such as Rectangle window, Hanning window, Hamming window, Blackman window and Kaiser window. The parameters of FIR filter can be changed for the simulation in the MATLAB environment.
Keywords：FIR window-function MATLAB simulation
