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Multipath Propagation of Acoustic Signal in a Swimming Pool-Source Localization Problem
Jacek Misiurewicz1, Konrad Bruliński2, Wiesław Klembowski2
1Institute of Electronic Systems, Warsaw University of Technology, 00-665 Warsaw, Poland.
Sensors (Basel, Switzerland)
|February 15, 2022
Summary
This study addresses severe underwater acoustic signal multipath in pools for emergency detection systems. Solutions involve optimizing signal transmission, receiver placement, and processing to improve underwater acoustic localization accuracy.
Area of Science:
- Acoustic Engineering
- Signal Processing
- Underwater Communications
Background:
- Swimming pools present unique acoustic challenges due to strong multipath propagation from flat surfaces.
- Severe multipath interference hinders the reliability of underwater acoustic emergency signaling and localization systems.
- Existing hydroacoustic applications do not fully account for the extreme reflections found in pool environments.
Purpose of the Study:
- To model the acoustic response of a swimming pool environment for simulation.
- To investigate remedies for multipath propagation affecting underwater acoustic systems.
- To develop an improved object localization algorithm for noisy acoustic environments.
Main Methods:
- Developed a computational model of swimming pool acoustic response.
- Explored waveform design for signal transmission to mitigate multipath.
- Investigated optimal receiver placement and advanced signal processing techniques.
- Proposed a multi-hypothesis localization algorithm accounting for reflections.
Main Results:
- Successfully modeled the swimming pool's acoustic characteristics.
- Identified effective transmit-side and receive-side strategies to reduce multipath effects.
- Demonstrated the feasibility of a multi-hypothesis approach for improved localization.
- The proposed methods show potential for enhancing the reliability of emergency detection systems.
Conclusions:
- Multipath propagation in swimming pools is a significant challenge for underwater acoustic systems.
- A combination of waveform design, strategic receiver placement, and advanced signal processing can mitigate these challenges.
- The developed multi-hypothesis localization algorithm offers a promising solution for accurate object detection in reverberant environments.
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