信号与系统-实验四

序Q4_6如下:b=[1/1601]%Thecoefficientvectoroftherightsideofthedifferentialequationa=[1221]%Thecoefficientvectoroftheleftsideofthedifferentialequation[H,w]=freqs(b,a);%ComputethefrequencyresponseHHm=abs(H);%ComputethemagnituderesponseHmphai=angle(H);%ComputethephaseresponsephaiHr=real(H);%ComputetherealpartofthefrequencyresponseHi=imag(H);%Computetheimaginarypartofthefrequencyresponsesubplot(221)splane(b,a),gridon,title('Thezero-polediagram'),xlabel('RealPart')%plot(w,Hm)subplot(222)plot(w,Hm),gridon,title('Magnituderesponse')%,xlabel('Frequencyinrad/sec')%plot(w,phai)subplot(223)plot(w,Hi),gridon,title('Theimpulseresponse')subplot(224)plot(w,phai),gridon,title('Phaseresponse')执行程序Q4_6得到的输入输出信号波形图如下:Q4-7已知一个因果系统的系统函数为,作用于系统的输入信号为,试用MATLAB帮助你求系统的响应信号y(t)的数学表达式。执行程序Q4_6得到的输入输出信号波形图如下:五、实验总结(留空手写)