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2.42 Bugfix for COST231 model

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This commit is contained in:
alex
2015-03-01 21:23:06 +00:00
parent c36e13eb38
commit 6d250fc7ec
9 changed files with 1484 additions and 19 deletions
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48
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--==[ Path Profile Analysis ]==--
Transmitter site: Tx
Site location: 52.1947 North / 2.0959 West
Ground elevation: 0.00 meters AMSL
Antenna height: 30.00 meters AGL / 30.00 meters AMSL
Distance to Rx: 19.89 kilometers
Azimuth to Rx: 89.69 degrees
Depression angle to Rx: -0.1701 degrees
Receiver site: Rx
Site location: 52.1953 North / 1.8041 West
Ground elevation: 0.00 meters AMSL
Antenna height: 2.00 meters AGL / 2.00 meters AMSL
Distance to Tx: 19.89 kilometers
Azimuth to Tx: 269.92 degrees
Depression angle to Tx: -0.0088 degrees
Longley-Rice path calculation parameters used in this analysis:
Earth's Dielectric Constant: 15.000
Earth's Conductivity: 0.005 Siemens/meter
Atmospheric Bending Constant (N-units): 301.000 ppm
Frequency: 800.000 MHz
Radio Climate: 5 (Continental Temperate)
Polarisation: 1 (Vertical)
Fraction of Situations: 50.0%
Fraction of Time: 50.0%
Summary for the link between Tx and Rx:
Free space path loss: 116.50 dB
Longley-Rice path loss: 170.10 dB
Attenuation due to terrain shielding: 53.60 dB
Mode of propagation:
Longley-Rice model error number: 0 (No error)
No obstructions to LOS path due to terrain were detected
Antenna at Rx must be raised to at least 83.99 meters AGL
to clear the first Fresnel zone.
Antenna at Rx must be raised to at least 37.97 meters AGL
to clear 60% of the first Fresnel zone.

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6
main.cpp
View File

@@ -1,4 +1,4 @@
double version=2.41;
double version=2.42;
/****************************************************************************\
* Signal Server: Server optimised SPLAT! by Alex Farrant *
******************************************************************************
@@ -24,8 +24,8 @@ double version=2.41;
/*
REQUIRES GCC >= 4.7
90m mode
g++ -Wall -Ofast -s -lm itwom3.0.cpp models.cpp main.cpp -o signalserver
30m HD mode
g++ -Wall -Ofast -s -lm itwom3.0.cpp models.cpp main.cpp -o signalserver
30m HD mode
g++ -Wall -Ofast -s -lm itwom3.0.cpp models.cpp main.cpp -DHD -o signalserverHD
*/

41
models.cpp
View File

@@ -1,15 +1,15 @@
/*****************************************************************************
* RF propagation models for Signal Server by Alex Farrant, CloudRF.com *
* *
* RF propagation models for Signal Server by Alex Farrant, CloudRF.com *
* *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License or any later *
* version. *
* *
* version. *
* *
* This program is distributed in the hope that it will useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* for more details. *
* for more details. *
*****************************************************************************/
#include <stdlib.h>
@@ -119,25 +119,34 @@ TxH = Base station height 30 to 200m
RxH = Mobile station height 1 to 10m
Distance 1-20km
modes 1 = URBAN, 2 = SUBURBAN, 3 = OPEN
http://morse.colorado.edu/~tlen5510/text/classwebch3.html
*/
if(f<1500 || f>2000){
printf("Error: COST231 Hata model frequency range 1500-2000MHz\n");
if(f<150 || f>2000){
printf("Error: COST231 Hata model frequency range 150-2000MHz\n");
return 0;
}
int C = 3; // 3dB for Urban
float lRxH = log10(11.75*RxH);
float C_H = 3.2*(lRxH*lRxH)-4.97; // Large city (conservative)
int c0 = 69.55;
int cf = 26.16;
if(f>1500){
c0=46.3;
cf=33.9;
}
if(mode==2){
C = 0; // Suburban, rural
C = 0; // Medium city (average)
C_H = 8.29*(lRxH*lRxH)-1.1;
}
if(mode==3){
C = -3; // Suburban, rural
C = -3; // Small city (Optimistic)
C_H = (1.1*log10(f) - 0.7) * RxH - (1.56 * log10(f)) + 0.8;
}
float lRxH = log10(11.75*RxH);
float C_H = 3.2*lRxH*lRxH-4.97;
float logf = log10(f);
double dbloss = 46.3 + (33.9 * logf) - (13.82 * log10(TxH)) - C_H + (44.9 - 6.55 * log10(TxH)) * log10(d) + C;
double dbloss = c0 + (cf * logf) - (13.82 * log10(TxH)) - C_H + (44.9 - 6.55 * log10(TxH)) * log10(d) + C;
return dbloss;
}
}
double SUIpathLoss(float f,float TxH, float RxH, float d, int mode){
/*
@@ -185,12 +194,12 @@ double ECC33pathLoss(float f,float TxH, float RxH, float d, int mode){
// MHz to GHz
f=f/1000;
double Gr = 0.759 * RxH - 1.862; // Big city (1)
double Gr = 0.759 * RxH - 1.862; // Big city with tall buildings (1)
// PL = Afs + Abm - Gb - Gr
double Afs = 92.4 + 20 * log10(d) + 20 * log10(f);
double Abm = 20.41 + 9.83 * log10(d) + 7.894 * log10(f) + 9.56 * (log10(f) * log10(f));
double Gb = log10(TxH/200) * (13.958 + 5.8 * (log10(d) * log10(d)));
if(mode>1){ // Medium city
if(mode>1){ // Medium city (Europe)
Gr = (42.57 + 13.7 * log10(f)) * (log10(RxH) - 0.585);
}
return Afs+Abm-Gb-Gr;
@@ -202,7 +211,7 @@ double EricssonpathLoss(float f,float TxH, float RxH, float d, int mode){
a0=43.2;
a1=68.93;
}
if(mode==1){ // High loss
if(mode==3){ // Low loss
a0=45.95;
a1=100.6;
}

BIN
signalserver
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