/*
 * RF range calculation per Egli model
 */

#define	_GNU_SOURCE
#include <math.h>
#include "range_func.h"

float rf_range_egli(float freq_mhz, float path_loss, float bts_ant_m,
		    float ms_ant_m)
{
	float l, r, x;

	l = 20.0f * log10f(freq_mhz / 40.0f);
	r = path_loss - l;
	x = bts_ant_m * ms_ant_m;
	return sqrtf(x / pow10f(r / -20.0f));
}