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04/22/23
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DIVERSITY DIVERSITY tools tools
for Satenv for Satenv
Presentation of toolsPresentation of tools
1. Antenna correlation tool• passive measurement• calculates the correlation between two complex antenna patterns
2. Cumulative distribution tool• Active measurement of a device with diversity function• Calculates the Cumulative Distribution Function (CDF) of measured data• Compare how this CDF is evolving when diversity is switched off and then
switched on
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Antenna correlation toolAntenna correlation tool
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ProcedureProcedure
Connect cable to antenna 1 and measure in SatenvConnect cable to antenna 1 and measure in Satenv
node of measurement 1 is creatednode of measurement 1 is created
Connect cable to antenna 2 and measure in SatenvConnect cable to antenna 2 and measure in Satenv
node of measurement 2 is creatednode of measurement 2 is created
Run macro to calculate the envelope correlation Run macro to calculate the envelope correlation coefficientcoefficient
a correlation node is created in Satenva correlation node is created in Satenv
Correlation formulasCorrelation formulas
Correlation function between two antenna radiation pattern
Envelope correlation coefficient
Macro interfaceMacro interface
Node 1
Node 2
Correlation
parameters• XPR• Phi distribution• Theta distribution
Press start button to create the coreelation function node in Satenv
Correlation parametersCorrelation parameters
Caracterize the antenna environment• Library included
XPR is related to the polarization
Phi distribution and Theta distribution are related to the antenna pattern
Plot of envelope correlation coefficient Vs frequencyPlot of envelope correlation coefficient Vs frequency
Computed coefficient can be viewed as asymptotic performances a multiple antenna system may achieve compared to a single antenna system.
The more the antennas of the system are correlated, the less diverse information they provide.
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Cumulative distribution toolCumulative distribution tool
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ProcedureProcedure
Measure TIS with diversity OFFMeasure TIS with diversity OFF
EIS data node 1 is createdEIS data node 1 is created
Measure TIS with diversity OnMeasure TIS with diversity On
EIS data node 2 is createdEIS data node 2 is created
Run macro to calculate CDF functionsRun macro to calculate CDF functions
A CDF node is created in SatenvA CDF node is created in Satenv
compare the 2 CDF function to compare the 2 CDF function to quantify the diversity gainquantify the diversity gain
Macro interfaceMacro interface
Node 1, Node 2
Layer
(Etotal)
Possibility to calculate the CDF for different frequencies
Press go to calculate
Plot CDF in SatenvPlot CDF in Satenv
CDF node is created in Satenv
Plot of the CDF function• Number of EIS values less than a given threshold
Diversity On
Diversity Off