数字滤波器的设计与仿真
Abstract
Facing the huge range of original signal, how to extract the required signal and
suppress unwanted signals which need to use the filter. The role of filters is to select
the desired signal frequency band and suppress the contents of the other bands do not
need the contents of the signal. Digital filters because of their high accuracy,
reliability, and flexibility advantages, in the speech signal processing, signal spectrum
estimation, signal de-noising, the number of wireless communications in frequency as
well as image processing and other projects are wide practical application. Impulse
response functions in accordance with its time-domain characteristics can be divided
into digital filter IIR (finite impulse response) and FIR (infinite impulse response). As
a powerful software, MATLAB provides a graphical user interface to prepare the
function. The so-called graphical user interface, referred to as the GUI, by a variety of
graphic object, such as the graphics window menu button, text box, such as building a
user interface.
MATALB can create a graphical user interface GUI (GraphicalUser
Interface), it is between user and computer tools. MATLAB support for all users GUl
controls are integrated in this environment and provide the interface appearance and
behavior in response to the way attribute settings methods, with the improved version,
this capability will continue to strengthen. And a powerful graphics capabilities, can
easily access to higher-quality curve.
Keywords: MATLAB；GUI；IIR；lter
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