随笔分类 -  信号处理

摘要：信号数字滤波概念 信号频域滤波方法 时域FIR滤波器设计和信号滤波 时域IIR滤波器设计和信号滤波 阅读全文

摘要：Fs = 5120;N = 1024;dt = 1.0/Fs; for i = 1:1024 x(i) = sin(2*pi*50*i*dt)+0.5*sin(2*pi*1500*i*dt); end plot(x); [c,l] = wavedec(x,3,'db7'); figure;plot( 阅读全文

摘要：Fs = 5000;a = 5; f =2; T = 1; dt = 1.0/Fs; N = T/dt; t = linspace(0,T,N); y = a*sin(2*3.14*f*t)+0.3*sin(100*3.14*f*t); subplot(2,1,1) ploy(t,y); x(1) 阅读全文

摘要：clc;clear all; Fs = 200; b = [1 0 0 0 0 0 -2 0 0 0 0 0 1]; a = [1 -2 1]; N = 2048; [h,w] = freqz(b,a,'whole',N); figure; subplot(2,1,1); plot(w(1:N/2) 阅读全文