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2.43

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alex
2015-03-06 21:57:17 +00:00
parent 6d250fc7ec
commit 0c4ff44a6e
10 changed files with 124 additions and 1435 deletions
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34
.txt
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@@ -2,25 +2,25 @@
--==[ Path Profile Analysis ]==-- --==[ Path Profile Analysis ]==--
Transmitter site: Tx Transmitter site: Tx
Site location: 52.1947 North / 2.0959 West Site location: 51.8648 North / 2.2022 West
Ground elevation: 0.00 meters AMSL Ground elevation: 0.00 meters AMSL
Antenna height: 30.00 meters AGL / 30.00 meters AMSL Antenna height: 36.00 meters AGL / 36.00 meters AMSL
Distance to Rx: 19.89 kilometers Distance to Rx: 1.00 kilometers
Azimuth to Rx: 89.69 degrees Azimuth to Rx: 91.27 degrees
Depression angle to Rx: -0.1701 degrees Depression angle to Rx: -1.5004 degrees
Receiver site: Rx Receiver site: Rx
Site location: 52.1953 North / 1.8041 West Site location: 51.8646 North / 2.1877 West
Ground elevation: 0.00 meters AMSL Ground elevation: 0.00 meters AMSL
Antenna height: 2.00 meters AGL / 2.00 meters AMSL Antenna height: 10.00 meters AGL / 10.00 meters AMSL
Distance to Tx: 19.89 kilometers Distance to Tx: 1.00 kilometers
Azimuth to Tx: 269.92 degrees Azimuth to Tx: 271.29 degrees
Depression angle to Tx: -0.0088 degrees Elevation angle to Tx: +1.4914 degrees
Longley-Rice path calculation parameters used in this analysis: Longley-Rice path calculation parameters used in this analysis:
Earth's Dielectric Constant: 15.000 Earth's Dielectric Constant: 15.000
Earth's Conductivity: 0.005 Siemens/meter Earth's Conductivity: 0.005 Siemens/meter
Atmospheric Bending Constant (N-units): 301.000 ppm Atmospheric Bending Constant (N-units): 301.000 ppm
Frequency: 800.000 MHz Frequency: 900.000 MHz
Radio Climate: 5 (Continental Temperate) Radio Climate: 5 (Continental Temperate)
Polarisation: 1 (Vertical) Polarisation: 1 (Vertical)
Fraction of Situations: 50.0% Fraction of Situations: 50.0%
@@ -30,9 +30,9 @@ Fraction of Time: 50.0%
Summary for the link between Tx and Rx: Summary for the link between Tx and Rx:
Free space path loss: 116.50 dB Free space path loss: 91.52 dB
Longley-Rice path loss: 170.10 dB Longley-Rice path loss: 92.83 dB
Attenuation due to terrain shielding: 53.60 dB Attenuation due to terrain shielding: 1.32 dB
Mode of propagation: Mode of propagation:
Longley-Rice model error number: 0 (No error) Longley-Rice model error number: 0 (No error)
@@ -41,8 +41,6 @@ Longley-Rice model error number: 0 (No error)
No obstructions to LOS path due to terrain were detected No obstructions to LOS path due to terrain were detected
Antenna at Rx must be raised to at least 83.99 meters AGL The first Fresnel zone is clear.
to clear the first Fresnel zone.
Antenna at Rx must be raised to at least 37.97 meters AGL 60% of the first Fresnel zone is clear.
to clear 60% of the first Fresnel zone.

4
CHANGELOG
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@@ -1,5 +1,9 @@
SIGNAL SERVER CHANGE LOG SIGNAL SERVER CHANGE LOG
2.43 - 06 Mar 2015
Improved model error handling
Tweaked params for Ericsson model and inverted environment variables to match rest
v2.41 - 27 February 2015 v2.41 - 27 February 2015
Simpler PPA output for scripting Simpler PPA output for scripting
Enabled new models for PPA (previously just ITM) Enabled new models for PPA (previously just ITM)

369
_curvature
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@@ -1,351 +1,18 @@
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2
_profile
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@@ -1 +1 @@
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2
main.cpp
View File

@@ -1,4 +1,4 @@
double version=2.42; double version=2.43;
/****************************************************************************\ /****************************************************************************\
* Signal Server: Server optimised SPLAT! by Alex Farrant * * Signal Server: Server optimised SPLAT! by Alex Farrant *
****************************************************************************** ******************************************************************************

45
models.cpp
View File

@@ -88,7 +88,7 @@ modes 1 = URBAN, 2 = SUBURBAN, 3 = OPEN
if(f<150 || f>1500){ if(f<150 || f>1500){
printf("Error: Hata model frequency range 150-1500MHz\n"); printf("Error: Hata model frequency range 150-1500MHz\n");
return 0; exit(EXIT_FAILURE);
} }
float lRxH = log10(11.75*RxH); float lRxH = log10(11.75*RxH);
float C_H = 3.2*lRxH*lRxH-4.97; float C_H = 3.2*lRxH*lRxH-4.97;
@@ -123,7 +123,7 @@ http://morse.colorado.edu/~tlen5510/text/classwebch3.html
*/ */
if(f<150 || f>2000){ if(f<150 || f>2000){
printf("Error: COST231 Hata model frequency range 150-2000MHz\n"); printf("Error: COST231 Hata model frequency range 150-2000MHz\n");
return 0; exit(EXIT_FAILURE);
} }
int C = 3; // 3dB for Urban int C = 3; // 3dB for Urban
@@ -157,40 +157,49 @@ double SUIpathLoss(float f,float TxH, float RxH, float d, int mode){
mode 1 = Hilly + trees mode 1 = Hilly + trees
mode 2 = Flat + trees OR hilly + light foliage mode 2 = Flat + trees OR hilly + light foliage
mode 3 = Flat + 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 d=d*1000; // km to m
if(f<1900 || f>11000){ if(f<1900 || f>11000){
printf("Error: SUI model frequency range 1.9-11GHz\n"); printf("Error: SUI model frequency range 1.9-11GHz\n");
return 0; exit(EXIT_FAILURE);
} }
// Terrain mode A is default // Terrain mode A is default
double a = 4.6; double a = 4.6;
double b = 0.0075; double b = 0.0075;
double c = 12.6; double c = 12.6;
double s = 10.6; double s = 10.6; // Optional fading value
int XhCF = -10.8; int XhCF = -10.8;
if(mode==2){ if(mode==2){
a=4.0; a=4.0;
b=0.0065; b=0.0065;
c=17.1; c=17.1;
s=9.6; s=6; // average
} }
if(mode==3){ if(mode==3){
a=3.6; a=3.6;
b=0.005; b=0.005;
c=20; c=20;
s=8.2; s=3; // Optimistic
XhCF = -20; XhCF = -20;
} }
double d0 = 100; double d0 = 100;
double A = 20 * log10((4*M_PI*d0)/(300/f)); double A = 20 * log10((4*M_PI*d0)/(300/f));
double y = (a - b * TxH) + (c/TxH); double y = (a - b * TxH) + c / TxH;
double Xf = 6 * log10(f/2000); double Xf = 6 * log10(f/2000);
double Xh = XhCF * log10(RxH/2); double Xh = XhCF * log10(RxH/2);
return A + (10*y*log10(d/d0)) + Xf + Xh + s; return A + (10*y*log10(d/d0)) + Xf + Xh + s;
} }
double ECC33pathLoss(float f,float TxH, float RxH, float d, int mode){ double ECC33pathLoss(float f,float TxH, float RxH, float d, int mode){
if(f<700 || f>3500){
printf("Error: ECC33 model frequency range 700-3500MHz\n");
exit(EXIT_FAILURE);
}
// MHz to GHz // MHz to GHz
f=f/1000; f=f/1000;
@@ -206,19 +215,29 @@ double ECC33pathLoss(float f,float TxH, float RxH, float d, int mode){
} }
double EricssonpathLoss(float f,float TxH, float RxH, float d, int mode){ double EricssonpathLoss(float f,float TxH, float RxH, float d, int mode){
double a0=36.2, a1=30.2, a2=12, a3=0.1; /*
if(mode==2){ // Med loss http://research.ijcaonline.org/volume84/number7/pxc3892830.pdf
AKA Ericsson 9999 model
*/
// Default is Urban which bizarrely has lowest loss
double a0=36.2, a1=30.2, a2=-12, a3=0.1;
if(f<150 || f>3500){
printf("Error: Ericsson9999 model frequency range 150-3500MHz\n");
exit(EXIT_FAILURE);
}
if(mode==2){ // Suburban / Med loss
a0=43.2; a0=43.2;
a1=68.93; a1=68.93;
} }
if(mode==3){ // Low loss if(mode==1){ // "Rural" but has highest loss according to Ericsson.
a0=45.95; a0=45.95;
a1=100.6; a1=100.6;
} }
double g1 = (11.75 * RxH) * (11.75 * RxH); double g1 = (11.75 * RxH) * (11.75 * RxH);
double g2 = (44.49 * log10(f)) - 4.78 * ((log10(f) * log10(f))); double g2 = (44.49 * log10(f)) - 4.78 * ((log10(f) * log10(f)));
double PL = a0+ a1 * log10(d) + a2 * log10(TxH) + a3 * log10(TxH) * log10(d) - (3.2 * log10(g1)) + g2; return a0 + a1 * log10(d) + a2 * log10(TxH) + a3 * log10(TxH) * log10(d) - (3.2 * log10(g1)) + g2;
return PL;
} }
double FSPLpathLoss(float f, float d){ double FSPLpathLoss(float f, float d){

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signalserver
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