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comparison pathloss/fsl.c @ 66:599fac1b882d

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pathloss: implement FSL
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 25 Oct 2024 08:12:28 +0000
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65:b3f04535eb14 66:599fac1b882d
1 /*
2 * Free Space Loss calculation
3 */
4
5 #define _GNU_SOURCE
6 #include <math.h>
7 #include "range_func.h"
8
9 #define PI_f ((float) M_PI)
10
11 float rf_range_freespace(float freq_mhz, float path_loss)
12 {
13 float wavelen = 300.0f / freq_mhz;
14
15 return (wavelen / pow10f(path_loss / -20.0f)) / (PI_f * 4.0f);
16 }