Barnes, Sarah
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Barnes, Sarah
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Barnes, Sarah
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Item-typ:Veröffentlichung, Experimental investigation of a virtual planar array for MIMO sonar systems(American Instut of Physics, 2022); ; ; ; In this paper a way to achieve a virtual two-dimensional planar array for sonar systems using the multiple input multiple output (MIMO) principle is presented. The time delay information of a planar array can be used for imaging sonars and allows the localization of scatterers in three-dimensional space. In a conventional single input multiple output (SIMO) sonar, this would be achieved using a single transmitter and a receiver consisting of a planar array of N² hydrophones, arranged as a rectangular N × N matrix. We show through simulations and experiments how a virtual planar array can be formed using a linear receiver array and linear transmitter array. For this, an experimental MIMO sonar system was constructed with a 32-channel receiver and a 12-channel transmitter, which allowed the realization of a virtual 32 × 12 array. The array design is analyzed through experiment in a harbor basin and through simulations, validating the principle of the virtual planar array. In addition to the experimental investigations, in which only a limited number of transmitter channels are available, further simulations with a 32 × 32 array are performed for further MIMO arrangements to highlight strengths and weaknesses in different application areas.Wissenschaftlicher ArtikelBand:47Heft:191 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Pulsformdesign für monostatische MIMO Sonarsysteme mit experimentellen Untersuchungen im Hafengebiet(Deutsche Gesellschaft für Akustik e.V., 2023); ; ; ; Wissenschaftlicher Artikel64 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Study on pulse form design for monostatic MIMO sonar systemsActive sonar systems typically consist of a transmitter (or transmitter array) and a receiver array and are known as a Single-Input-Multiple-Output (SIMO) system. A Multiple-Input-Multiple-Output (MIMO) sonar, on the other hand, uses multiple transmitters in order to emit different transmitter pulses into the same area. In a monostatic array, this allows the travel time information to be multiplied, resulting in high angular resolution at comparatively low hardware cost if the transmitter pulses can be separated from each other in the receive-side signal processing. This separation can be achieved by transmitting in different frequency or time windows, but this leads to a limited bandwidth or an increased overall ping period. In this paper, a method based on coding techniques and correlation filters are used for pulse separation, which means that the aforementioned limitations no longer apply. In doing so, this paper demonstrates various coding methods and the transmitted pulses generated by them for a monostatic MIMO sonar system. For comparison standard sonar pulses, such as linear frequency modulated (LFM), as well as hyperbolic frequency modulated (HFM) pulses are used as well. Furthermore, new approaches such as LFM sequences, LFM chains and orthogonal frequency division multiplexing are comparatively examined for the use of MIMO sonar systems.Wissenschaftlicher Artikel69 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, 30