srv p18-intro-v30
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www.sagax.hu
VHF sVHF softwareoftware radarradarbasedbased onon PP--18 antenna 18 antenna systemsystem
DrDr. Bertalan . Bertalan EgedEged*, Benjamin *, Benjamin BabjBabjákák******SagaxSagax CommunicationsCommunications, , Ltd.Ltd.HallerHaller u. 11u. 11--13. Budapest 113. Budapest 1096 Hungary096 Hungary
**Budapest University of Technology and Economics, **Budapest University of Technology and Economics, 1111 Budapest 1111 Budapest GoldmannGoldmann GyGy. t. téér 3.r 3.
www.sagax.huwww.sagax.hu
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ContentContent•• The goals of the projectThe goals of the project•• Technological goalsTechnological goals•• Implementation technologyImplementation technology•• System configurationSystem configuration•• User interfacesUser interfaces
–– PP indicatorPP indicator–– Control panelControl panel
•• Output signal descriptionOutput signal description•• Typical signal processing samplesTypical signal processing samples
–– Pulse compressionPulse compression–– IntegrationIntegration–– DMTIDMTI
•• Field trialField trial
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The goals of the projectThe goals of the project•• Experimental search radar equipment for air targets:Experimental search radar equipment for air targets:
–– lowlow--cross sectioncross section–– lowlow--heigthheigth–– unexpectedly occurunexpectedly occur
•• Experimental test systemExperimental test systemfor measurementsfor measurements
•• Using existing antennaUsing existing antennasystem and platform of Psystem and platform of P--1818
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Technological goalsTechnological goals•• SubSub--impulse modulated transmitterimpulse modulated transmitter•• Pulse compressed receiverPulse compressed receiver•• Semiconductor based Semiconductor based •• Computer controllableComputer controllable•• System integration readySystem integration ready
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Radio electronic equipmentRadio electronic equipment
Analogfront-end
Digitalprocessing
Domain conversionA/D és D/A
IF DownConversion
BasebandDown
Conversion
BasebandDemodulation
andProcessing
RF IF BB
Traditional implementation
Implementation based on Software Defind Radio Technology
Conversiontechnology
RFtechnology
DSPtechnology
MMI/GUItechnology
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Implementation levelsImplementation levelsDigitalsignal
handling
DigitalBB
DigitalIF
DigitalRF
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System configurationSystem configuration
P-18antennaplatform
Power supplydistributor
RFfront-end
Signal and dataprocessing
PPI
Antenna connection
RS-232
PlotsAntenna position
RS-232IP
SyncronizationinterfaceAntennacontrol
3X400Vor
3X220V
230V
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Experimental transceiverExperimental transceiver
PowerAmplifyer
TXup
converterDAC
Sub-impulsemodulated
pulse generator
Low-noiseAmplifyer
RXdown
converterADC
Pulse compression
receiver
T/Rswitch
Referenceoscillator
Control and power supply
Antenna
Antennaposition
Hardver platform
Operatingand application
programs
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Digital signal processingDigital signal processingDigitizedIF signal
DigitizedBB signal
Band limitedintegrated
signal
Compressedpulses
Moving targets
Stayingtargets CFAR
level
Shots Targets
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SubSub--impulse modulationimpulse modulation
0 0 .5 1 1 .5
x 1 0 -3
-2 0
0
2 0
4 0
6 0
8 0
Time
Impu
lse
Com
pres
sion
64us radiated pulse 1us compressed received pulse
Sub-impulsmodulated search signal
Matched-filterpulse compressor
1MHz bandwidth
DSPtechnology
DSPtechnolgy
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Compression gainCompression gain
0 0.2 0.4 0.6 0.8 1 1.2x 10-3
-10
0
10
20
30
40
time0 0.2 0.4 0.6 0.8 1 1.2x 10-3
14
15
16
17
18
19
20
21
time
sign
al
Receiver IF output: signal+noise
Output of the matched filter: SNR improoved
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Hardware implementationHardware implementationT/R switchLNA
Low-levelRF connections
IF and triggerconnections
PAPA Power supply
Isolation transformer Platformcomputer
Booster
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SolidSolid--state power amplifierstate power amplifier4X 800W 3200W
4X 200W
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Output power measurementOutput power measurement
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PP indicatorPP indicatorMenu
Icons
Status
Display area Control area
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Control panelControl panel
Controlarea
A-typeindicator
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Automatic trigger changingAutomatic trigger changing
500 Hz
320 Hz
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Output frequenciesOutput frequencies
153 155 157 159 161 163 165 167
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Pulse compression: BarkerPulse compression: Barker
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Pulse compression: MLSPulse compression: MLS
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Pulse compression: LFMPulse compression: LFM
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Pulse compression: P2Pulse compression: P2
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Digital signal processing: CINT=1Digital signal processing: CINT=1
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Digital signal processing: CINT=10Digital signal processing: CINT=10
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Digital signal processing: VINT=1Digital signal processing: VINT=1
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Digital signal processing: VINT=10Digital signal processing: VINT=10
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Digital signal processing: DMTIDigital signal processing: DMTI
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Digital signal processing: DMTI offDigital signal processing: DMTI off
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Digital signal processing: DMTI onDigital signal processing: DMTI on
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Results: compressed pulsesResults: compressed pulses
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Results: moving targetsResults: moving targets
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Results: decision hitsResults: decision hits
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Results: target searchResults: target search
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Results: plot generationResults: plot generation
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FieldField trialstrials•• NATO RTO SETNATO RTO SET--078 TG078 TG--046046
“Multi-Band Radar For Air Defense Systems”
•• COSIMA I Trial:COSIMA I Trial:–– 2004 October, Medina, Hungary2004 October, Medina, Hungary
•• COSIMA II Trial:COSIMA II Trial:–– 2005 September, 2005 September, LivornoLivorno, Italy, Italy
*Co-located Simultaneous Multi-band-radar Analysis
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COSIMA II site in ItalyCOSIMA II site in Italy
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COSIMA II deployed radarsCOSIMA II deployed radarsDIMURA (NO)
[5.9GHz]MELISSA (DE)[238-348MHz]
SRV-P18 (HU)[150-170MHz]
SzT-68UM (HU)[2.8-3.1GHz]
MMS-300 (IT)[2-18GHz]
ME
PH
IS(D
E)
[10/
35/9
4GH
z] 150MHz-94GHz
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COSIMA II targets and trajectoriesCOSIMA II targets and trajectoriesPiper:Cesna 172
JetKingAir 200
HelikopterB200
ShipRosetti
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COSIMA II measured plots COSIMA II measured plots vsvs GPSGPS
GPS tracksSRV-P18
plotskm
km
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COSIMA II: SRVCOSIMA II: SRV--P18 P18 ToszegToszeg vs. C1vs. C1
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ConclusionsConclusions•• A complete software based radar systemA complete software based radar system
–– Digital signal and data processingDigital signal and data processing–– VHF analog frontVHF analog front--end with end with
3KWp solid3KWp solid--state power amplifierstate power amplifier–– Interfacing to the existing PInterfacing to the existing P--18 antenna system18 antenna system
•• ErrorError--free operation during the field trialsfree operation during the field trials•• Capability of available technology and Capability of available technology and
knowledge base in Hungary was demonstratedknowledge base in Hungary was demonstrated
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