forked from ExternalVendorCode/Signal-Server
31 lines
991 B
C++
31 lines
991 B
C++
/*****************************************************************************
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* ITU-R P.525 Free Space Path Loss model for Signal Server by Alex Farrant *
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* 15 January 2014 *
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* This program is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU General Public License as published by the *
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* Free Software Foundation; either version 2 of the License or any later *
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* version. *
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* *
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* This program is distributed in the hope that it will useful, but WITHOUT *
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
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* for more details. *
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* */
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#include <math.h>
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double FSPLpathLoss(float f, float d)
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{
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/*
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Free Space Path Loss model
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Frequency: Any
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Distance: Any
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*/
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//MHz to GHz
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f = f / 1000;
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double dbloss = (20 * log10(d)) + (20 * log10(f)) + 92.45;
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return dbloss;
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}
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