3-10.m

matlab数字信号与应用源代码3

%例程3-10 产生扫频信号频谱

t = -1:0.001:1;                        %时间范围为[-1 1]，采样频率为1kHz
fo = 100; f1 = 400;                    %起始频率为100Hz，终止频率为400Hz
y = chirp(t,fo,1,f1,'q',[],'convex');         
spectrogram(y,256,200,256,1000,'yaxis')