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Activity title

Spatial and Waveform Diverse Noise Radar

Activity Reference

SET-225

Panel

Sensors & Electronics Technology

Security Classification

NATO UNCLASSIFIED

Status

Active

Activity type

RTG

Start date

2015

End date

2018

Keywords

Doppler, High Dynamic Range, ISAR, MIMO, Noise Radar

Background

The proposed group will focus on the particular open issues which remain following the work of two previous RTGs. SET-101, Noise Radar Technology ran from the end of 2005 until the middle of 2009. This group established the essential strengths and weaknesses of noise radar for military applications. The greatest strengths are the difficulties an opponent would have in exploiting the signals and its freedom from ambiguities. The greatest problem is handling the dynamic range of radar signals. The natural dynamic range of a noise radar being equal to its time bandwidth product. SET-184, Capabilities of Noise Radar started at the beginning of 2012 and will finish at the end of 2014. Following on from the conclusions of the earlier group, SET-184 has concentrated on where noise radar will be of military value. The value of Low Probability of Exploitation/Interception (LPE/LPI) capabilities has been confirmed. A further set of potential applications has centered around Multiple-Input, Multiple-Output (MIMO) radar configurations, to which noise waveforms are well suited since many quasi-orthogonal waveforms can easily be created which can be resolved despite operating the same time and frequency space. Noise radar similarly has a potential contribution to make to improving the spectral efficiency of radars by offering new approaches to spectrum sharing. SET-184 also undertook further analysis of the dynamic range issues, by using tailored waveforms as well as using appropriate post processing. The group also carried out trials to gather data in order to enable further exploration of these approaches and to allow practical investigation of MIMO noise radar. From the work of SET-184 it has become clear that noise waveforms can be applied to advantage to particular short-range systems where good LPE/LPI capabilities are important, for example for missile fusing. It is also clear that in most areas of noise radar technology our understanding is now at a level where industrial development could start, but basic research, which is best undertaken as a collaborative activity, is still required to address the areas emphasized above: Dynamic Range Enhancement with tailored waveforms; Doppler processing, especially Inverse Synthetic Aperture Radar (ISAR), and operation in MIMO configurations.

Objectives

Share experience of processing to improve the dynamic range returns either by the use of tailored waveforms or by different sidelobe suppression techniques. Support further detailed investigation and analysis of the LPI/LPE characteristics of random waveforms. Share experience of MIMO processing using noise radar signals, including control of the sidelobes in range and bearing. Share experience of ISAR processing of noise radar signals, including control of Doppler sidelobes. Perform further analysis of the noise radar data recorded in 2013 under SET-184 to support the above activities. Plan new field trials, based on the information gained from the analysis results of the existing trials data. Maintain a watch on key technologies for noise radar including the state-of-the-art in areas such as analogue to digital conversion, linear receiver design and the generation of statistically pure noise. Maintain an up-to-date assessment of the organizations known to be active in noise radar around the world. Keep NATO abreast with what noise radar systems we believe adversaries could deploy

Topics

Share experience, based in part around the noise radar data gathered by SET-184: • to improve the dynamic range returns. • to improve understanding of the practical application to MIMO and ISAR processing Maintain a watch on key technologies for noise radar Maintain an up-to-date assessment of the organizations known to be active in noise radar around the world.

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