代码搜索：小信号
找到约 10,000 项符合「小信号」的源代码
代码结果 10,000
www.eeworm.com/read/168455/9912324
m example2_4_1.m
load wbarb; %装载图像信号
whos
figure(1);
image(X); colormap(map); colorbar; %显示图像
[cA1,cH1,cV1,cD1] = dwt2(X,'bior3.7'); %完成图像的单尺度小波分解
A1 = upcoef2('a',cA1,'bior3.7',1); %从系数中重构低频和高频部分
H1 = upcoef2('
www.eeworm.com/read/362220/10011892
m program_16_09.m
%生成含噪的多项式信号
N=800;
t=1:N;
sig=t.^2-t+1;
x=sig+randn(1,N);
%一维小波分解
[c,l] = wavedec(x,4,'db3');
%[c,l] = wavedec(x,4,'db2');
%重构第1～4层逼近系数
a4 = wrcoef('a',c,l,'db3',4);
a3 = wrcoef('a',c,l,'db3
www.eeworm.com/read/362220/10012269
m program_04_01.m
%% 本程序采用Mallat算法对信号进行小波分析
clc;clear;
%% 1.正弦波定义
f1=50; % 频率1
f2=100; % 频率2
fs=2*(f1+f2); % 采样频率
Ts=1/fs; % 采样间隔
N=120; % 采样点数
n=1:N;
y=sin(2*pi*f1*n*Ts)+sin(2*pi*f2*n*Ts
www.eeworm.com/read/359229/10160675
m example2_4_1.m
load wbarb; %装载图像信号
whos
figure(1);
image(X); colormap(map); colorbar; %显示图像
[cA1,cH1,cV1,cD1] = dwt2(X,'bior3.7'); %完成图像的单尺度小波分解
A1 = upcoef2('a',cA1,'bior3.7',1); %从系数中重构低频和高频部分
H1 = upcoef2('
www.eeworm.com/read/163075/10176932
m example2_4_1.m
load woman; %装载图像信号
whos
figure(1);
image(X); colormap(map); colorbar; %显示图像
[C,S] = wavedec2(X,2,'bior3.7'); %图像的多尺度二维小波分解
cA2 = appcoef2(C,S,'bior3.7',2); %从上面的C中提取第二层的低频系数
cA1 = appcoef2(C,
www.eeworm.com/read/357662/10203392
m 例程16-9.m
%生成含噪的多项式信号
N=800;
t=1:N;
sig=t.^2-t+1;
x=sig+randn(1,N);
%一维小波分解
[c,l] = wavedec(x,4,'db3');
%[c,l] = wavedec(x,4,'db2');
%重构第1～4层逼近系数
a4 = wrcoef('a',c,l,'db3',4);
a3 = wrcoef('a',c,l,'db3
www.eeworm.com/read/357595/10205194
m f10_2.m
%生成含噪的多项式信号
N=800;
t=1:N;
sig=t.^2-t+1;
x=sig+randn(1,N);
%一维小波分解
[c,l] = wavedec(x,4,'db3');
%[c,l] = wavedec(x,4,'db2');
%重构第1-4层逼近系数.
a4 = wrcoef('a',c,l,'db3',4);
a3 = wrcoef('a',c,l
www.eeworm.com/read/161995/10348591
m f10_2.m
%生成含噪的多项式信号
N=800;
t=1:N;
sig=t.^2-t+1;
x=sig+randn(1,N);
%一维小波分解
[c,l] = wavedec(x,4,'db3');
%[c,l] = wavedec(x,4,'db2');
%重构第1-4层逼近系数.
a4 = wrcoef('a',c,l,'db3',4);
a3 = wrcoef('a',c,l,'db
www.eeworm.com/read/425287/10365720
m f10_2.m
%生成含噪的多项式信号
N=800;
t=1:N;
sig=t.^2-t+1;
x=sig+randn(1,N);
%一维小波分解
[c,l] = wavedec(x,4,'db3');
%[c,l] = wavedec(x,4,'db2');
%重构第1-4层逼近系数.
a4 = wrcoef('a',c,l,'db3',4);
a3 = wrcoef('a',c,l,'db
www.eeworm.com/read/160253/10548877
m example2_4_1.m
load wbarb; %装载图像信号
whos
figure(1);
image(X); colormap(map); colorbar; %显示图像
[cA1,cH1,cV1,cD1] = dwt2(X,'bior3.7'); %完成图像的单尺度小波分解
A1 = upcoef2('a',cA1,'bior3.7',1); %从系数中重构低频和高频部分
H1 = upcoef2('