43 lines
922 B
Matlab
43 lines
922 B
Matlab
function PD = PQmovPD (Ehs)
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% Probability of detection
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% P. Kabal $Revision: 1.1 $ $Date: 2003/12/07 13:34:47 $
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Nc = length (Ehs);
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% Allocate storage
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PD.p = zeros (1, Nc);
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PD.q = zeros (1, Nc);
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persistent c g d1 d2 bP bM
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if (isempty (c))
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c = [-0.198719 0.0550197 -0.00102438 5.05622e-6 9.01033e-11];
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d1 = 5.95072;
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d2 = 6.39468;
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g = 1.71332;
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bP = 4;
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bM = 6;
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end
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for (m = 0:Nc-1)
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EdBR = 10 * log10 (Ehs(1,m+1));
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EdBT = 10 * log10 (Ehs(2,m+1));
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edB = EdBR - EdBT;
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if (edB > 0)
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L = 0.3 * EdBR + 0.7 * EdBT;
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b = bP;
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else
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L = EdBT;
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b = bM;
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end
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if (L > 0)
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s = d1 * (d2 / L)^g ...
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+ c(1) + L * (c(2) + L * (c(3) + L * (c(4) + L * c(5))));
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else
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s = 1e30;
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end
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PD.p(m+1) = 1 - 0.5^((edB / s)^b); % Detection probability
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PD.q(m+1) = abs (fix(edB)) / s; % Steps above threshold
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end
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