The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
As a core component of underwater localization, accurate acoustic ranging is quite challenging because of the harsh characteristics of underwater environments (e.g., refraction and reflection). To enhance ranging accuracy, ranging schemes employing a ray tracing model and a sound speed profile have been proposed; however, the existing schemes require numerous ray tracing iterations to perform ranging...
Location information is fundamental and essential for UWSNs monitoring underwater environment. Underwater environment requires three dimensional localization algorithm. Several localization protocols and system architectures have been proposed for underwater sensor networks. In this paper, 3D underwater localization algorithm is proposed for near-sea marine monitoring system, using a small number...
In underwater sensor networks, localization is one of the most important issues because sensor nodes are considerably difficult to be deployed at determined locations. Localization schemes using a mobile beacon have fine-grained localization accuracy because one mobile beacon can replace a lot of static beacons. In localization with a mobile beacon, the movement of a mobile beacon determines the deployment...
In underwater sensor networks, localization is one of the most important issues because sensor nodes are considerably difficult to be deployed at determined locations. Since range-based schemes require additional device and precise time synchronization for measuring distances in underwater environments, range-free schemes are promising in the view point of energy consumption and implementation. Coarseness...
This paper presents a bearings-only tracking (BOT) scheme based on distributed floating beacons in underwater sensor networks (UWSNs). Conventional BOT systems extract target-originated bearings in noisy measurements, locate and track targets based on the bearings in real time. We propose a tracking scheme by modifying BOT systems for UWSNs where a multidimensional assignment (MDA) method is used...
In this paper, we propose a floating beacon-assisted 3-D localization for variable sound speed in underwater sensor networks (FBL-VSS). Most underwater localization schemes have assumed that the sound speed is constant under water for simplicity; however, it is actually variable depending on depth and seasonal variation. Taking into account various sound speed, FBL-VSS utilizes novel beacons moored...
In underwater sensor networks (UWSNs), localization is an important issue and a challenging task due to harsh environments for people to access. In this paper, we propose a distributed algorithm to locate nodes deployed in 3-D space using long-range beacons floating on the sea surface. Long-range beacons allow underwater nodes directly to obtain reference positions of beacons and to measure distances...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.