基于MATLAB的FIR和IIR数字滤波器的设计与仿真毕业设计精选.docVIP

基于MATLAB的FIR和IIR数字滤波器的设计与仿真毕业设计 Abstract Information is everywhere, but after entering the era of network information, regardless of the amount of information, or its transfer speed, are increasing at a high speed. The carrier signal is the dissemination of information, but in the signal generation, transmission and dissemination process, will inevitably introduce some other signal component. So, in signal processing, we need on the received signal is filtered to remove noise, interference, so as to obtain the signal component effective. In electronic systems, this task is usually accomplished by filter. The main content of this paper is the basic method of using MATLAB tools to design two kinds of digital filters. These two kinds of digital filter with infinite impulse response IIR, Infinite Impulse Response filter and the finite impulse response FIR, Finite Impulse Response filter, the input and output signals are digital signals. The design method of traditional digital filter is complicated, complicated calculation process, once the design is complete, not convenient to modify the filter characteristic curve, very inconvenient, the above disadvantages greatly limits the development and application of digital filter. While MATLAB and its toolbox function with very strong, we use the software design of two kinds of filter above, can be done at any time the results curve and target filtering characteristics, so as to make improvements, save time and effort, notable advantages. This paper is divided into three parts: the first part is the preface, and Prospect of digital signal processing is introduced in the filter function; the second part introduces the principle of FIR filter design, and introduces the method of using MATLAB to design FIR digital filter, and the simulation on the MATLAB; third part introduces the principle of IIR filter design, and introduces the method of using MATLAB IIR digital filter design, and Simulation in MATLAB. Keywords: MATLA