Results 191 to 200 of about 5,633 (244)

Design of the Active Sonar Responder

2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference (IMCEC), 2018
The 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.
Xiaoqing Zheng, Xiaopeng Kong, Weizheng Zhang, Rijie Yang   +3 more
exaly   +2 more sources

Trading detection for resolution in active sonar receivers

Journal of the Acoustical Society of America, 2011
This paper proposes an active sonar receivers that offers a smooth trade-off between detection and resolution. A matched filter is the optimal detector of known signals in white Gaussian noise but may fail to resolve the targets if the time separation of targets is less than the mainlobe width of the autocorrelation function of the transmitted signal ...
John R Buck, James A Simmons, Buck John R   +2 more
exaly   +3 more sources

Enhanced multistatic active sonar signal processing

Journal of the Acoustical Society of America, 2013
Multistatic 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, Junli Liang, Johan Karlsson   +2 more
exaly   +3 more sources

Unleashing the Power of Active Sonar

IEEE Pervasive Computing, 2017
The authors explore various applications that can be enabled by transforming mobile devices into active sonar systems. Specifically, they show how to use microphones and speakers available on existing smartphones to monitor minute body movements such as breathing.
Rajalakshmi Nandakumar, Shyamnath Gollakota   +1 more
openaire   +1 more source

Improved active sonar detection using autoregressive prewhiteners

Journal of the Acoustical Society of America, 1990
An active sonar receiver is proposed that more closely approximates the optimal prewhitener and matched filter receiver than currently existing active sonars. The prewhitener is based on an autoregressive model for the reverberation that is shown through
Steven Kay
exaly   +2 more sources

Active sonar simulation

The Journal of the Acoustical Society of America, 2008
An exemplary embodiment of the invention relates to a method and system for displaying simulated acoustically realistic active sonar signals. The method includes simulating a realistic sounding active sonar signal that originates from a simulated sonar transmitter.
Ronald Frances Norwood, Cathy Christensen Matthews   +1 more
openaire   +1 more source

Synthetic aperture active sonar imaging

[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992
The main problems involved in synthetic aperture sonar imaging are medium instability, slow mapping rate, and platform motion. Proposed solutions to these problems are reviewed, and a new technique for synthetic aperture sonar imaging is presented which allows a fast mapping rate and improved motion compensation.
Brett L. Douglas, Hua Lee
openaire   +1 more source

Adaptive waveform selection for active sonar

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
Investigates an adaptive waveform selection scheme where selection is based on overall tracking performance of the active sonar system. The assumption of an optimal receiver allows the inclusion of transmitted waveform specification parameters in the tracking sub-system equations, leading to a waveform selection scheme where the next transmitted ...
David J. Kershaw, Robin J. Evans 0001
openaire   +1 more source

Performance improvement of localization for active sonars

2012 18th Asia-Pacific Conference on Communications (APCC), 2012
In 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.
Eun-Jeong Jang, Dong Seog Han
openaire   +1 more source

Application of DORT to active sonar

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600), 2005
Active sonar in shallow water is often reverberation-limited and the detectability is often limited by the presence of too many false alarms. The problem of improving detection, and classification, in shallow water is being worked on in several different ways. The time reversal operator decomposition (DORT) is a technique that has recently been applied
C.F. Gaumond, D.M. Fromm, J. Lingevitch, R. Menis, G. Edelmann, D. Calvo, E. Kim   +6 more
openaire   +1 more source