Summer of LabVIEW The Sunny Side of System Design 30th June - 18th July 1
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National Instruments USRP RDS platform for passive radar systems development Mª Pilar Jarabo Amores Universidad de Alcalá, Dpto Teoría de la Señal y comunicaciones. mpilar.jarabo@uah.es
The Challenge Coherent acquisition of multichannel signals captured by single radiating elements of an antenna array. Data storage for off-line processing. 100 50 db 0-50 -1-0.5 0 0.5 1 Frequency (Hz) x 10 7 3 channel DVB-T signal NI USRP 2921/2922 family 4 company logo hre
GTAF University of Alcala High Frequency Technologies Research Group Research activity: Radar signal processing Active and passive radar sensors. Conventional, HRR, SAR, ISAR. Detection, tracking and classification tasks. Propagation and scattering of electromagnetic waves. Microwave circuits design: antenna, transmitter, receiver. Digital communication systems. Software Defined Radio (SDR). Electromagnetic compatibility. 5
Passive Bistatic Radar (PBR) A set of techniques that uses non-cooperative signals as Illuminators of Oporttunity, instead of a dedicated one, to detect targets and to estimate parameters. Advantages: Low development and maintenance costs. No frequency allocation. Low probability of intercept. Challengues: Detection and classification stages are difficult to design. 6
Passive Bistatic Radar (PBR) Basic receiver architecture Reference signal Target echo Multipath Clutter 7
Coherent acquisition and processing of multichannel signals DVB-T signals: Bandwidth independent of information content. Good Ambiguity function. Possibility of using consecutive channels: System resolution signal bandwidth CAF generation Pre-processing stages: Reference signal reconstruction/equalization. DPI rejection: adaptive filtering techniques 8 company logo hre
Array signal processing techniques Digital beamforming techniques: Multiple beams are simultaneously generated for covering the area of interest. An independent processing chain is developed for each beam. Space Adaptive Processing techniques A CAF is generated with the signal acquired by each single radiating element. SAP techniques are applied to the set of CAFs for generating a set of beams 9 company logo hre
IDEPAR project Improved DEtection techniques for PAssive Radars: Research project funded by the Spanish Ministry of Economy and Competitiveness (Reference TEC2012-38701). Technological objective: IDEPAR demonstrator. To prove the feasibility of passive radars for the detection and tracking of slow moving targets in terrestrial scenarios. Design, development and test platform for future projects. 10 company logo here
IDEPAR demonstrator Global requirements: COTS (Commercial off-the-shelf) components: commercial antennas, acquisition boards (daughter-boards and ADCs), standard RF-components and workstations. Pre-processing, detection and tracking stages are processed off-line. High versatility and modularity. IDEPAR v1 IDEPAR v2 IDEPAR v3 11 company logo here
IDEPAR demonstrator 12 company logo here
IDEPAR demonstrator Signal bandwidth: 25 MHz Central frequency: from 450 MHz up to 850 MHz Up to 6 receiver s chains working simultaneously: Reference antenna Surveillance antenna Televés DAT HD BOSS 75 Televes 4GNOVA Up to 40 seconds of continuous acquisition: 100 MBps / acquisition channel. 13 company logo here
IDEPAR demonstrator NI USRP 2921/2922 family: Software defined radio (SDR) transceivers. Frequency Range: 50 MHz 2.2 GHz. 400 MHz 4.4 GHz. Bandwidth up to 40 MHz Programmable data transfer to memory or hard disk (drivers, LabVIEW) (Ettus) OctoClock G : 8-Way Distribution timing source with (10 MHz and 1 PPS). Multi-Channel Synchronization. GPS external clock can be used. Automatic switch over in case of failure or disconnect 14 company logo here
NI sales engineers support NI proposal for upgrading the passive radar demonstrator: NI peer-to-peer (P2P) streaming technology: Direct, point-to-point transfers between multiple instruments without sending data through the host processor or memory. Devices can share information without burdening other system resources. High performance controllers: Integrated CPU (multicore), hard disk, RAM, Ethernet, video, keyboard/mouse, serial, USB and other peripherals. OS (Windows or LabVIEW Real Time) NI FlexRIO FPGA Modules: High performance reconfigurable devices Maximum Peer-to-Peer Rate: 800MB/s- 3.2MB/s Special thanks to David Sierra Field Sales Engineer National Instruments Spain 15 company logo here
Thank you Questions? company logo here