In shis thesis,the main function is that: test 26 road signal of channel of broadcasting station,among these signal of channel,find out whether the frequency is between 20hz and 20khz, if not, then should alarm.
In this thesis,the method is use MATLAB MATLAB/FDATOOL design the digit filter. In the whole design, the filter desin is one of the step. The most problem is realization that function: test 26 road signal of channel of broadcasting station.Want to realization that function,in this design,use MATLAB\SIMULINK.
In this thesis,the bandwidth of the digit filter is 40hz-15khz,use this filter realize that function: test 26 road signal of channel of broadcasting station.
Keywords:digit filter of band-pass ;MATLAB;FDATOOL;SIMULINK