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Now showing items 31-40 of 41
Protection in ports: countering underwater intruders
(NURC, 2007/10)
The advance of new capability depends on many things: the state of the art in technology, the clarity of the mission and requirements, the knowledge of the threat, the means of response, and, for developers, the state of ...
Experimental results of 300 kHz shallow water synthetic aperture sonar
(NURC, 2007/11)
The design of a shallow water synthetic aperture sonar (SAS) requires an understanding of key system and environmental issues. The main factors which limit SAS performance are micronavigation accuracy, where micronavigation ...
Contact-level multistatic sonar data simulator for tracker performance assessment
(NURC, 2006/08)
This paper provides an overview of a multistatic sonar contact-data simulation approach and a dataset generated specifically for tracker algorithm evaluation by the Multistatic Tracking Working Group (MSTWG). A brief ...
On the integration of through-the-sensor geoacoustic inversion techniques for environmental adaptation schemes in low frequency active sonars
(NURC, 2007/12)
The environmental conditions in shallow water areas are known to strongly affect the performances of low frequency active sonars (LFAS). In particular, interactions of the acoustical field with the seabed interface have ...
Automatic change detection for the monitoring of cluttered underwater areas
(NURC, 2008/09)
Automating the surveillance of cluttered underwater areas (such as ports) poses several problems, the main one being the high number of contacts that any automatic target recognition (ATR) system will produce when surveying ...
Multi-waveform active sonar tracking
(NURC, 2007/06)
This paper extends the NURC distributed multihypothesis
Signal processing for an active sonar system suitable for advanced sensor technology applications and environmental adaptation schemes
(NURC, 2006/08)
An overview of the basic elements of an active sonar system in conjunction with a description of the signal processing chain utilized at the NATO Undersea Research Centre for detection and localization of undersea targets ...
Underwater intruder detection sonar for harbour protection: state of the art review and implications
(NURC, 2006/08)
Sonar is the sensor of choice for wide-area underwater surveillance because sonar (based on sound waves) typically provides a much larger area of coverage than radar (electromagnetic waves) or video (visible light) can ...
Adaptive sub-band processing in active detection and tracking
(NURC, 2007/11)
Broadband active systems have the potential to increase detection performance in reverberation-limited areas through increased signal bandwidth, i.e. small resolution cell. However, large bandwidth could over-resolve the ...
Benchmark evaluation of multistatic trackers
(NURC, 2006/08)
This paper provides an overview of the Special Session on Multistatic Sonar and Radar Tracking at FUSION 2006. This includes background on the Multistatic Tracking Working Group, a brief description of the datasets and ...