求小波降噪程序

dingyan

求小波降噪程序

lostspace

x=x1;
figure(1)
plot(x);
[thr,sorh,keepapp]=ddencmp('den','wv',x);%根据信号计算噪声强度，给出 全局阀值
xc=wdencmp('gbl',x,'sym4',2,thr,sorh,keepapp);%根据全局阀值对信号进行降噪
figure(2)
plot(xc);