A5019910086- Underwater Acoustics Research
- Underwater Vehicles and Communication Systems
- Maritime Navigation and Safety
- Marine animal studies overview
- Energy Efficient Wireless Sensor Networks
Teledyne Technologies (United States)
2006-2021
In stark contrast to a typical underwater acoustic network (UAN) deployed in mid-latitudes, ice-covered environments make deployment difficult and expensive. A limited number of nodes must cover ranges hundreds kilometers. We tackle the design three layers: engineering, physical, networking. At engineering layer, we investigate hardware bandwidth limitations for real-world implementation. Based on proposed bandwidth, software modem equipped with waveforms achieving 1.8, 21.4, 96.2 b/s. The...
The Arctic Ocean and its various shallow passages are rapidly changing due to global warming. development of a large-scale wireless network that collects distributes oceanographic data remotely would be an extremely valuable asset researchers. This concept, however, is completely dependent upon the ability acoustically transmit digital information under water over long ranges, which not currently available. In this work, we investigate performance four transceivers based on frequency-hopping...
The advent of reliable and flexible underwater acoustic communications has insured the core technology required for integrated, autonomous solutions pertaining to undersea vehicle navigation, object marking, environmental sensing, ASW surveillance sensors. This paper focuses on ONR-and SPAWAR-funded efforts which have produced two new battery-powered, modem-based tools supporting operations. share common methodologies, ranging bearing estimation infrastructure, electronics, yet provide...