matlab 信号重建
Wm=180*pi;Wc=Wm;fs=300;Ws=2*pi*fs;n=-800:800;nTs=n/fs;fa=5.1*sin(2*pi*40*nTs)+1.8*sin(4*pi*40*nTs)+0.8*sin(5*pi*40*nTs)Dt=1/fs;t1=-0.1:Dt:0.1fa1=fa/fs*Wc/pi*sinc((Wc/pi)*(ones(length(nTs),1)*t1-nTs✀*ones(1,length(t1))));figure(1);plot(t1,fa1);axis([-0.1 0.1 -8 8])xlabel(✀fs=300Hz,fa利用内插由样本重建原信号图✀);谁能解释一下这一句fa1=fa/fs*Wc/pi*sinc((Wc/pi)*(ones(length(nTs),1)*t1-nTs✀*ones(1,length(t1))));谢谢！能不能具体解释一下那一句：fa1=fa⼀fs*Wc⼀pi*sinc((Wc⼀pi)*(ones(length(nTs),1)*t1-nTs✀*ones(1,length(t1))));
