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www.m3systems.netM3Systems We Guide You J anvierr2013
GNSS TEST RECEIVER: INTERFERENCE CASE STUDY
Marc Pollina
NI Aerospace & Defense Forum 2013
June, 13th 2013
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SOMMAIRE
www.m3systems.netM3Systems We Guide You J anvierr2013
M3 systemsGNSS context
Interference environment
DME/TACAN test caseVST based integrated test bench
Conclusions
Questions
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Company overview
Independent SME Started in 1999, nearby Toulouse 35 engineers
Turnover : 2.9M (2012)
Offices in Bordeaux and subsidiary in Belgium
Engineering services Satellite navigation (GNSS)
Air trafic management
Innovation R&D activity Radio-navigation technologies (GNSS, hybridization)
futures navigation applications(military, transport, aerospace)
Products
airport (e-TrackAir) Galileo receiver & signal generator
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Autonomous vehicle
R&D project
CTS-SAT project (DGCIS)
demonstration at La Cit de lEspace , Toulouse
(summer 2009)
TAXISAT project (FP7) :
demonstration at Francorchamp racing circuit in Belgium(summer 2013)
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Assisted GNSS for military application
Conception Achievement
Electronic
Mechan
ical
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Airport product: e-TrackAir
EGNOS based Navigation solution for airport vehiculeoperating in the manoeuvring area
Reduction of runway incursion risks
Record & Replay trajectories (runway inspection)
Generation of mission reports
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GNSS CON TEXT :
GAL I L EO &
M ULT I - CON STELLAT I ON
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GALILEO IOV
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GALILEO deployment
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GNSS systems
GPS ( USA) operational since 1995 ( 30 satellites)
GLONASS (Russia) est nouveau oprationnel depuis 2010(29 satellites/22 operational)
GALILEO (Europe) under deployment , first services in 2015, fullyoperational in 2020 (30 satellites)
COMPASS(China) under deployment
IRNSS (India) geostationnary satellites
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RF signals for GNSS systems
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GNSS I N TERFEREN CE
EN V I RONM EN T
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Summary of main interference sources
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DME : 1151-1213 Mhz
GNSS Spectrum & DME
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DME/ TA CAN
I n t e r f e r e n c e t e s t c a se
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DME signal characteristics
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- Degradation of C/N0 ( Blue curve)
- Increased errors in pseudo-distance (Green curve)
- Loss of tracking in some test scenario
Impact of DME on GNSS receivers
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VST Ba s e d
I n t e g r a t e d GN SS t e s t b e n ch
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Reference model
Applications
NavigationEn h a n c e d N a v i g a t i o n
I n tg r i t y
PVT
BB signalprocessing
P o u r s u i t e Dm od u la t i o n
A c q u i s i t i o n
Co r rla t io n
RF processing
Hybridation
Interfacesd
ecommunicat
ion
Con
trle/Commande
Ca
pteurs
&
Assistance
Missions
NavigationT r a j e c t o g r a p h i e Rx
O r b i t o g r a p h i e
N a v i g a t i o n m e s sa g e s P r o p a g a t i o n
BB signal processingSi S I / Q g e n e r a t i on
RF processing
Inte
rferences
Con
trle/Comma
nde
Simulateur Navigateur
E
rreurs
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GNSS receiver modules
GPS GLONASS
tracking & data demodulation
GALILEO BEIDOU
Correlation
E6E1/L1
Front End
E5/L5 L2
Couche PVT
Hybridization multi-constellations
Canal
Canal
Canal
Canal
Canal
Time
synch
Time & position
RF Signals
Rawdata &internal
data: Canal
Canal
Canal
Canal
Canal
Canal
Canal
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Integration of GNSS IPs into the VSTplatform to provide modular & configurablesolutions :
log & replay
signal generation
open receiver
GNSS functions integration
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Intgrated GNSS testbench
Existing IP (FPGA
Spartan 6)
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VST B d GNSS T t b h
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HIGH LEVEL OF RF PERFORMANCESFOR RECEPTION AND TRANSMISSIONALLOWING TO COVER THE WHOLE GNSSSPECTRUM;
RADIO-SOFTWARE APPROACH THATENABLES HIGH FLEXIBILITY ANDMODULARITY THROUGH LABVIEWENVIRONMENT;
FPGA CAPABILITIES TO ACCESS HIGHREAL TIME PERFORMANCES IN
PARTICULAR TO IMPLEMENT LOW LEVELPROCESSING CAPABILITIES (E.G.,DEMODULATION AND CORRELATION).
VST Based GNSS Test bench
Hi h l l f b bilit
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High level of observability
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CONCLUSI ON S
Integrated test bench concept
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VST technology enables high performancesoftware radio implementation
M3 Systems is using these capabilities tocover multiple GNSS use cases
We open the way towards affordable &configurable solutions to support GNSS
research & industry.
Integrated test bench concept
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Key features
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Analyse real signals (log & replay)
Generate GNSS signals, includinginterferences
Assess receivers performances,including innovative algorithms
Flexible & modular : multi-constellation& multi-frquency by softwareconfiguration
Key features
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