correlation in TDOA LOCALIZATION

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ali hassan
ali hassan on 21 Sep 2020
function [ reliability ] = corr_reliability( correlation )
%corr_reliability calculates reliability 0..1 of the correlation result
% Looks for 2nd highest outstanding PEAK (not sample!) and returns "1 - amplitude percentage in comparison to main peak"
% e.g. main peak 10, 2nd peak 3 -> output: 0.7
[corr_max, idx] = max(correlation);
correlation_temp = correlation;
correlation_temp(idx) = 0;
bin_right_old = corr_max;
for ii=idx+1:1:length(correlation) % delete all decreasing values on right side
if (correlation_temp(ii) < bin_right_old)
bin_right_old = correlation_temp(ii);
correlation_temp(ii) = 0;
else
break;
end
end
bin_left_old = corr_max;
for ii=idx-1:-1:1 % delete all decreasing values on left side
if (correlation_temp(ii) < bin_left_old)
bin_left_old = correlation_temp(ii);
correlation_temp(ii) = 0;
else
break;
end
end
peak2 = max(correlation_temp); % look for 2nd (real) peak
reliability = 1-(peak2 / corr_max);
end
this is a function.i want to know what this function is actually doing.

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