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CDR & NSDR

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This commit is contained in:
Antonin Portelli
2024-01-12 14:21:39 +01:00
parent c73b609ac5
commit 1604b4712f
5 changed files with 36 additions and 8 deletions
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33
lib/Core/Math.cpp
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@ -18,6 +18,7 @@
*/
#include <LatAnalyze/Core/Math.hpp>
#include <LatAnalyze/Numerical/GslFFT.hpp>
#include <LatAnalyze/includes.hpp>
#include <gsl/gsl_cdf.h>
@ -48,16 +49,42 @@ DMat MATH_NAMESPACE::corrToVar(const DMat &corr, const DVec &varDiag)
return res;
}
double MATH_NAMESPACE::svdDynamicRange(const DMat &mat)
double MATH_NAMESPACE::conditionNumber(const DMat &mat)
{
DVec s = mat.singularValues();
return s.maxCoeff()/s.minCoeff();
}
double MATH_NAMESPACE::svdDynamicRangeDb(const DMat &mat)
double MATH_NAMESPACE::cdr(const DMat &mat)
{
return 10.*log10(svdDynamicRange(mat));
return 10.*log10(conditionNumber(mat));
}
template <typename FFT>
double nsdr(const DMat &m)
{
Index n = m.rows();
FFT fft(n);
CMat buf(n, 1);
FOR_VEC(buf, i)
{
buf(i) = 0.;
for (Index j = 0; j < n; ++j)
{
buf(i) += m(j, (i+j) % n);
}
buf(i) /= n;
}
fft(buf, FFT::Forward);
return 10.*log10(buf.real().maxCoeff()/buf.real().minCoeff());
}
double MATH_NAMESPACE::nsdr(const DMat &mat)
{
return ::nsdr<GslFFT>(mat);
}
/******************************************************************************