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GDR9000 Digital Radar
Analyser
1EWSA – November 2019
EWSA – November 2019 2
Overview
• Introduction to Digital ELINT
• ELINT Overview
• Pros and Cons of Digital Receivers
• GDR9000 Approach
• GDR9000 Receiver
• Integration with Sysdel Meerkat
• Radar Analyser UI
• Intra-pulse analysis
• SP4000C Recorder
EWSA – November 2019 3
Electronic Intelligence (ELINT)
• Covert gathering of information from electronic signals that do not contain speech or text (COMINT)
• Main goal of ELINT is to facilitate actions which will preserve the use of the electromagnetic spectrum for allies,
while denying its use to the enemy
• In contrast to RW or ESM systems, ELINT is aimed at long-term strategic planning, even (especially) during
peacetime
• ELINT Systems typically have automated elements, but also involve operator-in-the-loop analysis
• Information collected through ELINT can contribute to:
• Targeting and mission planning
• Optimization of both defensive and offensive military actions
• Operational intelligence
• Construction and maintenance of threat libraries and databases
• Driving the design and operation of ED/EA systems (RW, ESM, etc)
Digital Receivers
EWSA – November 2019 4
Advantages:
• Maximum preservation of signal information
• Pulse parameters
• Modulation on pulse
• Pulse transients and amplifier characteristics
• High sensitivity due to frequency-domain processing gain
• Better PoI for LPI Radars
• Processing of time-overlapping pulses in different bands
• Extraction of advanced parameters (inter-pulse and intra-pulse modulation, emitter-specific fingerprinting, etc)
• Facilitates post-processing and recording
• Flexibility and reconfigurability
Constraints:
• Demanding sampling and processing requirements
• High-speed networking and storage requirements
• Early data reduction is critical
GDR9000 Receiver
5
• 1x 3 GSPS 14-bit ADC
• Wideband processing
• 1x 204.8 MSPS 16-bit ADC
• Narrowband, high sensitivity processing
• 2x 40 GbE interfaces
• Raw IF Recording
• IQDW Transport
• Upgradable to 100 GbE
• Xilinx Ultrascale MPSoC
• Onboard signal detection
• Data reduction
• Receiver control
EWSA – November 2019
Integration with Sysdel Meerkat
EWSA – November 2019 6
GDR9000 Digital Receiver
Antenna
SysdelReceiver
1U Processing Server
Online ELINT
Processor
Sysdel Meerkat ESPU
ESPU HMI
HMI Workstation
GDR9000
4U SP4000C Storage Pod
RAID
40 GbE
10 GbE
IF Inputs
PDW interface
Radar Analyser UI
EWSA – November 2019
Wideband Waterfall
Wideband SpectrumAnalysis Channel
Detected PDW Overview
PA
PW
PRI
PF
Pulse Selection
7
Intra-Pulse Analysis
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Pulse Waterfall Instantaneous Amplitude
Instantaneous Frequency
Instantaneous Phase
Pulse Selection Table
8
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Intra-pulse analysis can reveal interesting signal characteristics for fingerprintingNon-uniform frequency response
Ground reflectionOvershoot
Ground Reflection
Intra-Pulse Analysis
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5 dB3 dB
Intra-Pulse Analysis
15
Intra-pulse analysis across multiple detections confirms emitter-specific characteristics
3 dB3 dB3 dB3 dB3 dB3 dB3 dB3 dB3 dB3 dB
EWSA – November 2019
Intra-Pulse Modulation
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SP4000C Recorder
• Up to 48 Solid State Drives (SSDs)
• RAID 0 configuration for maximum throughput
• 40GbE Networking
Three-tiered recording approach:
• Tier 1:
• Raw IF Data
• Maximum bandwidth and storage requirements
• Maximum potential for additional information
extraction during postprocessing
• Tier 2:
• IQDW and PDW Data
• Pre-extracted pulse metadata with
corresponding baseband IQ samples
• Tier 3:
• PDW Data
• Pre-extracted pulse metadata, no IQ data
Questions?
EWSA – November 2019 17