correlation of 2 signals

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ali hassan
ali hassan 2020-11-27
编辑： KSSV 2020-11-27
https://www.mathworks.com/matlabcentral/answers/664433-different-results-with-same-code#answer_557433
need little help.
i am actually correlating two signals. i want to circ shift the signal by (-1.9282e-12) and then find this delay by delay command.
code:
% t=linspace(0,1000,100001) %in ms
xs=randn(1,100001)
grid on
subplot(3,1,1)
plot(t,xs)
title('SIGNAL RECEIVED AT MASTER')
shift_ms = 10;
%SIGNAL RECEIVED AT RECEIVER 1(TIME DELAYING THE DISCRETE SIGNAL)
x1=circshift(xs,shift_ms*.1); %signal received at receiver 1
subplot(3,1,2)
plot(t,x1)
title('SIGNAL RECEIVED AT RECEIVER#1')
[c,lags]=xcorr(xs,x1);
subplot(3,1,3)
plot(lags,c)
title('CORRELATION OF RECEIVER 1 AND PROCESSING UNIT')
[maxval indx]=max(c)
shiftCalc_ms = (length(t)-indx)/10
t21 = finddelay(xs,x1)
output:

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