2.5 - Major refactor

models/sui.cc

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+double SUIpathLoss(float f, float TxH, float RxH, float d, int mode)
+{
+	/*
+	   f = Frequency (MHz)
+	   TxH =  Transmitter height (m)
+	   RxH = Receiver height (m)
+	   d = distance (km)
+	   mode 1 = Hilly + trees
+	   mode 2 = Flat + trees OR hilly + light foliage
+	   mode 3 = Flat + light foliage
+	   http://www.cl.cam.ac.uk/research/dtg/lce-pub/public/vsa23/VTC05_Empirical.pdf
+	 */
+	d = d * 1000;		// km to m
+	if (f < 1900 || f > 11000) {
+		printf("Error: SUI model frequency range 1.9-11GHz\n");
+		exit(EXIT_FAILURE);
+	}
+	// Terrain mode A is default
+	double a = 4.6;
+	double b = 0.0075;
+	double c = 12.6;
+	double s = 10.6;	// Optional fading value
+	int XhCF = -10.8;
+
+	if (mode == 2) {
+		a = 4.0;
+		b = 0.0065;
+		c = 17.1;
+		s = 6;		// average
+	}
+	if (mode == 3) {
+		a = 3.6;
+		b = 0.005;
+		c = 20;
+		s = 3;		// Optimistic
+		XhCF = -20;
+	}
+	double d0 = 100;
+	double A = 20 * log10((4 * M_PI * d0) / (300 / f));
+	double y = (a - b * TxH) + c / TxH;
+	double Xf = 6 * log10(f / 2000);
+	double Xh = XhCF * log10(RxH / 2);
+
+	return A + (10 * y * log10(d / d0)) + Xf + Xh + s;
+}