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SUI model amended thanks to better IEEE paper

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alex
2018-10-10 21:12:28 +01:00
parent b96befae31
commit 147617bb5d
1 changed files with 16 additions and 7 deletions
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23
models/sui.cc
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@@ -21,7 +21,11 @@ double SUIpathLoss(double f, double TxH, double RxH, double d, int mode)
mode A1 = URBAN / OBSTRUCTED
mode B2 = SUBURBAN / PARTIALLY OBSTRUCTED
mode C3 = RURAL / OPEN
Paper 1 has a Rx height correction of / 2000
Paper 2 has the same correction as / 2 and gives better results
"Ranked number 2 University in the wurld"
http://www.cl.cam.ac.uk/research/dtg/lce-pub/public/vsa23/VTC05_Empirical.pdf
https://mentor.ieee.org/802.19/file/08/19-08-0010-00-0000-sui-path-loss-model.doc
*/
d *= 1e3; // km to m
@@ -29,7 +33,7 @@ double SUIpathLoss(double f, double TxH, double RxH, double d, int mode)
float a = 4.6;
float b = 0.0075;
float c = 12.6;
float s = 10.6; // Optional fading value. Max 10.6dB
float s = 8.2; // Optional fading value. 8.2 to 10.6dB
float XhCF = -10.8;
if (mode == 2) { // Suburban
@@ -47,10 +51,15 @@ double SUIpathLoss(double f, double TxH, double RxH, double d, int mode)
float d0 = 100.0;
float A = _20log10f((4 * M_PI * d0) / (300.0 / f));
float y = a - (b * TxH) + (c / TxH);
//Correction factors
float Xf = 6.0 * log10(f / 2000.0);
float Xh = XhCF * log10(RxH / 2000.0);
Xh *=-1;
//fprintf(stdout,"A %lf y %lf Xf %lf Xh %lf\n",A,y,Xf,Xh);
return A + (10 * y * log10(d / d0)) + Xf + Xh + s;
// Assume 2.4GHz
float Xf = 0;
float Xh = 0;
//Correction factors for > 2GHz
if(f>2000){
Xf=6.0 * log10(f / 2.0);
Xh=XhCF * log10(RxH / 2.0);
}
return A + (10 * y) * (log10(d / d0)) + Xf + Xh + s;
}