examp15.m

来自「ADSP TOOLBOX: Version 2.0 and gui m-file」· M 代码 · 共 13 行

clc,echo on 
%EXAMPLE 15 
t=0:0.01:2;                         % Time array 
xs=sin(2*pi*t);                     % Signal 
xn=randist(xs,'uni',0);             % Uniform noise (mean=0)
snr=18;                             % Desired SNR
A=std(xs)/std(xn)/(10^(snr/20));    % Compute A
x=xs+A*xn;                          % Generate noisy signal  
plot(t,xs),pause(2)
plot(t,xn)
echo off %end of example