Adaptive sampling - practice example

[karzimir]

Hello everyone,

in every book about signal processing we can find information about reggular sampling, but i need concrete practical example how to use adaptive sampling?

 

[Maharshi]

close all;
clear all;clc;

t=1:0.025:5;
desired=5*sin(2*3.*t);

noise=5*sin(2*50*3.*t);

refer=5*sin(2*50*3.*t+ 3/20);

primary=desired+noise;

subplot(4,1,1);
plot(t,desired);
ylabel('desired');


subplot(4,1,2);
plot(t,refer);
ylabel('refer');



subplot(4,1,3);
plot(t,primary);
ylabel('primary');



order=2;
mu=0.005;
n=length(primary)
delayed=zeros(1,order);
adap=zeros(1,order);
cancelled=zeros(1,n);

for k=1:n,
delayed(1)=refer(k);
y=delayed*adap';
cancelled(k)=primary(k)-y;
adap = adap + 2*mu*cancelled(k) .* delayed;
delayed(2rder)=delayed(1rder-1);
end

subplot(4,1,4);
plot(t,cancelled);
ylabel('cancelled');