2023_programme: Large aperture, sparse pulse coded MIMO sonars, principles and performance

• Session: 13. Sonar Performance Modelling and Verification: Applications to Active and Passive Sonar
  Organiser(s): Mathieu Colin, Mark Prior, Kevin Heaney and Dale Ellis
• Lecture: Large aperture, sparse pulse coded MIMO sonars, principles and performance [invited]
  Paper ID: 2015
  Author(s): Malyuskin Oleksandr, McKernan Adrian, Raj Alex Noel, Cooper David
  Presenter: Malyuskin Oleksandr
  Abstract: The operation principles of 2D and 3D large aperture, sparse MIMO sonars, their key imaging characteristics and processing speed will be discussed in this talk. These types of sonars can be applied in many ultrasonic imaging applications, including underwater target localisation, proximity sensing, and real-time underwater imaging. The study focuses on the operation of pulsed narrowband sonars using multiple orthogonal frequency bands and phase coding to achieve beamforming control in both transmit and receive modes. A particular emphasis is given to the sonar modes' inter-operability (for example, sequential Single Input Single Output, Multiple Input Single Output and full MIMO modes) and the effect of this interoperability on the underwater target(s) resolution, discrimination and processing speed. \n The mathematical model of imaging is based on the time-domain scattering amplitude calculation and its evaluation using first and second-order asymptotics. \n\nThe target(s) features extraction based on the cross-correlation function envelop shape is discussed in detail with an experimental demonstration of the 2D sonar with a field-programmable-gate-array (FPGA) digital signal processing core.
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• Corresponding author: Dr Oleksandr Malyuskin
  Affiliation: ECIT, Queen's University Belfast
  Country: United Kingdom
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