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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