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4020112Matlab/Simulink136000Matlab/SimulinkMATLAB7.0,,SimulinkMatlab/SimulinkMatlab/SimulinkMatlabSimulinkTP391.9A1007-39732011002-040-021,,Matlab1984,SimulinkMatlabMatlabSimulink,Matlab/Simulink,,,2(),,,,,(AM)(FM)(PM)120Hz100Hz1.1ab1ab1.221.33fs2048Hz,2048(FFT)M:fs=2048;%N=2048;%t=linspace(0,1,fs);%et=sin(20*2*pi*t);%f=[-1024:1023]/N*fs;%yk=fft(et,N);%yw=abs(fftshift(yk))/N;%at=et.*cos(100*2*pi*t);%yk1=fft(at,2048);%4120112yw1=abs(fftshift(yk1))/N;%22ab2cd2(a)(b)cdM:fs=2048%N=2048%t=linspace(0,1,fs)%et=sin(20*2*pi*t)%at=et.*cos(100*2*pi*t)%rt=at.*cos(100*2*pi*t)%f=[-1024:1023]/N*fs%yk=fft(rt,N)%yw=abs(fftshift(yk))/N%b=ones(1,10)/10ft1=filtfilt(b,1,mo)%yk1=fft(ft1,N)%yw1=abs(fftshift(yk1))/N%3(a)(b)(c)(d)33ab3cd4SimulinkSimulink:(1);(2);(3);(4)4ScopeBufferedFFTFrameScopeSimulink4Simulink5Matlab/SimulinkMatlab/SimulinkMATLAB[1],,.()[M].:,2000.[2].()[M].:,2005.[3].Simulink[J].,2008,6:3-6.[4].[J].,2004,20:90-92.[5].-[M].:,2005.