数字信号处理实验报告答案(6)
发布时间:2021-06-06
发布时间:2021-06-06
数字信号处理实验的代码,仅参考
grid on;
subplot(4,2,2);
plot(W/(2*pi*1000),Xa*1000); ylabel('Xa(w)'); grid on; Ts1=0.0002; n1=-25:1:25;
x1=exp(-1000*abs(n1*Ts1)); Ts2=0.001; n2=-5:1:5;
x2=exp(-1000*abs(n2*Ts2)); N=500; k=0:1:N; w=pi*k/N;
X1=x1*exp(-j*n1'*w); X1=real(X1);
X2=x2*exp(-j*n2'*w); X2=real(X2);
w=[-fliplr(w),w(2:N+1)]; X1=[fliplr(X1),X1(2:N+1)]; X2=[fliplr(X2),X2(2:N+1)]; subplot(4,2,3);
stem(n1*Ts1*1000,x1); ylabel('x1(n)');
legend('抽样频率f1='); grid on;
subplot(4,2,4); plot(w/pi,X1); ylabel('X1(w)'); grid on;
subplot(4,2,5);
stem(n2*Ts2*1000,x2); ylabel('x2(n)');
legend('抽样频率f2='); subplot(4,2,6); plot(w/pi,X2); ylabel('X2(w)'); Fs1=1/Ts1; nTs1=n1*Ts1;
xa1=x1*sinc(Fs1*(ones(length(n1),1)*t-nTs1'*ones(1,length(t)))); subplot(4,2,7); plot(t*1000,xa1); ylabel('xa1(t)'); grid on;
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