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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