Results 271 to 280 of about 4,113,395 (325)
Fundamentals of Bistatic Active SONAR [PDF]
, 1989 The purpose of this paper is to provide an introduction to bistatic active sonar. We consider only the simplest case of a single source and a single spatially-separated receiver. The extension to multiple sources and receivers is straightforward and involves the same concepts and principles.
openaire +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Design of the Active Sonar Responder
2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference (IMCEC), 2018The active sonar responder can provide coordinate target for the development, the test and the acceptance of the active sonar. The paper analyzes the characteristics of typical active sonar signal briefly. Then the active sonar responder is designed. The hardware design and the software design are enlarged on.
Xiaopeng Kong +3 more
openaire +2 more sources
Featureless classification for active sonar systems
OCEANS'10 IEEE SYDNEY, 2010Active sonar systems depend on classification algorithms to identify target echoes and suppress false alarms. Historically, classifiers use a set of empirically derived features that exhibit some statistical separation between background clutter and target echoes.
Mary E. Soules, Joshua Broadwater
openaire +3 more sources
Gray whales hear and respond to signals from a 21–25 kHz active sonar
Marine mammal science, 2020Funding information Office of Naval Research, Grant/Award Number: N00014-02-C-0180 Abstract Shore-based theodolite tracking of eastern gray whale (Eschrichtius robustus) movements was conducted to test for potential whale responses to a high-frequency ...
A. Frankel, P. Stein
semanticscholar +1 more source
Array Modeling of Active Sonar Clutter [PDF]
OCEANS 2007, 2007 Active sonar systems operating in shallow-water environments often deal with excessive false alarms, generically referred to as clutter, that are more numerous than expected for Rayleigh-distributed reverberation. The clutter probability density function, and therefore the probability of false alarm (P fa), depends on the scattering sources ...
openaire +2 more sources
, 2020
In order to improve the detection performance of active sonar and make up for the shortcomings of pulsed active sonar (PAS), linear frequency-modulated continuous wave (LFMCW) was applied in continuous active sonar (CAS).
Dali Liu +3 more
semanticscholar +1 more source
In order to improve the detection performance of active sonar and make up for the shortcomings of pulsed active sonar (PAS), linear frequency-modulated continuous wave (LFMCW) was applied in continuous active sonar (CAS).
Dali Liu +3 more
semanticscholar +1 more source
Continuous Active Sonars for Littoral Undersea Surveillance
IEEE Journal of Oceanic Engineering, 2019Recent advances in transducer and computing technology have pushed the concept of continuous active sonar (CAS) or high duty cycle sonar as an area of interest for application to antisubmarine warfare. Unlike conventional pulsed active sonars, CAS processing aims at detecting echoes while transmitting with a nearly 100% duty cycle. This paper describes
Andrea Munafo +2 more
openaire +4 more sources
Enhanced multistatic active sonar signal processing
2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013Multistatic active sonar systems involve the transmission and reception of multiple probing sequences and can achieve significantly enhanced performance of target detection and localization through exploiting spatial diversity. This paper mainly focuses on two signal processing aspects of such systems, namely, enhanced range-Doppler imaging and ...
Kexin Zhao +3 more
openaire +4 more sources
Performance improvement of localization for active sonars
2012 18th Asia-Pacific Conference on Communications (APCC), 2012In sonar systems, the reverberation is a primary cause of false alarm. The multiple return association and localization (MRAL) algorithm is a data-fusion algorithm that can efficiently reduce the false alarm rate. The localization results of MRAL are lattice points that are the nearest points to targets in a searching area.
Dong Seog Han, Eun Jeong Jang
openaire +2 more sources
Efficient Active Sonar Multitarget Tracking
OCEANS 2006 - Asia Pacific, 2006The active sonar environment presents a challenge for any tracking system. Multipath propagation and the fact that targets are, in general, extended objects mean that multiple measurements may be obtained for each target in the surveillance region. In addition, other objects and random scatterers introduce clutter measurements.
F. Fletcher +3 more
openaire +2 more sources