dqeye.m

经典书籍《通信系统仿真原理与无线应用》chap8部分课后题仿真源代码

function [] = dqeye(xd,xq,m)
lx = length(xd); % samples in data segment
kcol = floor(lx/m); % number of columns
xda = [0,xd]; xqa = [0,xq]; % append zeros
for j = 1:kcol % column index
for i = 1:(m+1) % row index
kk = (j-1)*m+i; % sample index
y1(i,j) = xda(kk);
y2(i,j) = xqa(kk);
end
end
subplot(211) % direct channel
plot(y1,'k');
title('D/Q EYE DIAGRAM');
xlabel('Sample Index');
ylabel('Direct');
subplot(212) % quadrature channel
plot(y2,'k');
xlabel('Sample Index');
ylabel('Quadratute');
subplot(111)
% End of function file.