Question

Hi I need help understanding this matlab code. Can you add comments or at least state what the lines in this code are doing. Thanks!

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(2:order)=delayed(1:order-1);
end

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

Answer 1

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