scholarly journals SONAR Systems and Underwater Signal Processing: Classic and Modern Approaches

Sonar Systems ◽  
10.5772/17505 ◽  
2011 ◽  
Author(s):  
Hossein Peyvandi ◽  
Mehdi Farrokhrooz ◽  
Hossein Roufarshbaf ◽  
Sung-Joon Park
Keyword(s):  
Signal Processing ◽  
Sonar Systems

scholarly journals Digital Signal Processing Applied to the Modernization Of Polish Navy Sonars

2014 ◽  
Vol 21 (2) ◽  
pp. 65-75 ◽  
Author(s):  
Jacek Marszal
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Electronic Systems ◽  
Ultrasound Transducers ◽  
Processing Methods ◽  
Complete Replacement ◽  
University Of Technology ◽  
Sonar Systems ◽  
Signal Processing Methods

AbstractThe article presents the equipment and digital signal processing methods used for modernizing the Polish Navy’s sonars. With the rapid advancement of electronic technologies and digital signal processing methods, electronic systems, including sonars, become obsolete very quickly. In the late 1990s a team of researchers of the Department of Marine Electronics Systems, Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, began work on modernizing existing sonar systems for the Polish Navy. As part of the effort, a methodology of sonar modernization was implemented involving a complete replacement of existing electronic components with newly designed ones by using bespoke systems and methods of digital signal processing. Large and expensive systems of ultrasound transducers and their dipping and stabilisation systems underwent necessary repairs but were otherwise left unchanged. As a result, between 2001 and 2014 the Gdansk University of Technology helped to modernize 30 sonars of different types.

scholarly journals Digital Signal Processing Approach in Air Coupled Ultrasound Time Domain Beamforming

2015 ◽  
Vol 39 (1) ◽  
pp. 37-50
Author(s):  
Krzysztof Herman ◽  
Tadeusz Gudra ◽  
Joanna Furmankiewicz
Keyword(s):  
Signal Processing ◽  
Microphone Array ◽  
Dimensional Space ◽  
Digital Signal ◽  
Laboratory Research ◽  
Wave Source ◽  
Optimal Processing ◽  
Sonar Systems ◽  
Mems Microphones ◽  
Signal Processing Algorithms

Abstract The work presents the results of experimental study on the possibilities of determining the source of an ultrasonic signal in two-dimensional space (distance, horizontal angle). During the research the team used a self-constructed linear array of MEMS microphones. Knowledge in the field of sonar systems was utilized to analyse and design a location system based on a microphone array. Using the above mentioned transducers and broadband ultrasound sources allows a quantitative comparison of estimation of the location of an ultrasonic wave source with the use of broadband modulated signals (modelled on bats' echolocation signals) to be performed. During the laboratory research the team used various signal processing algorithms, which made it possible to select an optimal processing strategy, where the sending signal is known.

scholarly journals METHODS FOR IMPLEMENTING NEURAL NETWORK HYDROACOUSTICS ALGORITHMS BASED ON HETEROGENEOUS HARDWARE PLATFORM GRIFON

2019 ◽  
pp. 48-59
Author(s):  
G. G. Alekseev ◽  
E. A. Alekseeva ◽  
P. V. Galagan ◽  
A. P. Sorokin ◽  
S. А. Sorokin
Keyword(s):  
Neural Network ◽  
Signal Processing ◽  
Open Architecture ◽  
The Arctic ◽  
Mathematical Software ◽  
Hardware Platform ◽  
Economic Interests ◽  
Sonar Systems ◽  
Minimal Mass ◽  
Digital Equipment

Recently, there has been an increase of interest in creating new neural network hydroacoustics algorithms, for example, test sites  in the Arctic are being created to evaluate the effectiveness of target detection and to ensure the safety of the Canadian North.  The open architecture allows you to adapt hardware to new threats or economic interests. Not only the equipment of radiation and  reception of hydroacoustic systems is improved, but also their processing. The article discusses the ways of improvement and the  principles of building specialized computers based on the GRIFON hardware platform, providing control and signal processing  in mobile and stationary sonar systems. We consider an example of creating a complex that demonstrates the capabilities of  the equipment and the prospects for creating calculators with high parameters and minimal mass‑dimensional characteristics.  Described in detail the structure and principles of the mathematical software of specialized computer. Comparative characteristics  of the proposed algorithms that can be used to optimize signal processing paths and the volume of digital equipment are given.

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