|Multi-dimensional Radar Imaging
|Sensors & Electronics Technology|
ISAR, Multi-channel Radar, Multi-frequency Radar, Multi-static Radar, Polarimetric Radar, Radar Imaging, SAR
SAR/ISAR images have been largely used for monitoring small to large areas and more specifically for target recognition/identification. Nevertheless, limited resolution, self-occlusion effects, geometrical limitations and some difficulties in the image interpretation strongly affect the imaging system effectiveness and, therefore, the performance Automating Target Recognition (ATR) systems. Some of these limitations are due to the use of classical monostatic, single channel system, single frequency and single polarization systems, as they are simpler to build and handle than more complex systems. Nevertheless, solutions have been proposed in the recent NATO SET-196 RTG that show the benefit of using multi-channel/multi-static radar imaging systems when dealing with non-cooperative targets, which can be realized without enormous costs. This NATO SET-196 follow-on activity would like to stem off the results obtained in the previous TG to further develop systems and algorithms by improving what has been previously done and by extending the system dimensionality to include also multi-frequency, multi-polarization and multi-pass radar. The aim is to further increase the performance of radar imaging systems in order to improve the effectiveness of ATR systems. Also, in view of the increasing number of drone-like platforms, multidimensional radar will be assessed and compared against mono-dimensional ones in terms of their ability to provide valid support for classification and recognition of such targets.
The proposed activity addresses the following Long Term Capability Requirements (LCTR): Intelligence Surveillance and Reconnaissance (ISR) Collection Capability as it aims at providing higher quality/resolution 2D and 3D radar images of non-cooperative targets which may significantly increase ATR. The proposed activity also falls within DAT #1 and DAT #2 definitions as high quality radar images may be used to improve Large Aircraft Survivability and Protection of Harbours and Ports. UK6 taxonomy: A09.04 – Image/Pattern Processing Technology.
The broad objective of this team is to investigate the use of multi-dimensional radar to form multi-perspective high-resolution 2D, 3D and tomographic radar images of targets, with the scope of enhancing target classification and recognition. To achieve this objective, the working parties will undertake the following:
1) Define a general framework for multi-dimensional radar imaging,
2) Define signal models and 2D/3D/tomographic image formation techniques for multi-channel/multi-static radar imaging systems,
3) Identify existing multi-dimensional radar imaging systems that may be used to collect data to validate the proposed models and to test the algorithm effectiveness,
4) Compare performance with mono-dimensional radar imaging systems and give indications regarding possible improvement of ATR systems,
5) Analyse the impact on military applications and provide indications for future military use.
The technical topics that will be studied in this RTG are listed (although not necessarily limited to) as follows: 1) Multi-dimensional imaging radar systems, 2) Multi-dimensional radar signal processing, image formation and feature extraction, 3) Multi-dimensional radar imaging system analysis and performance prediction