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.
In underwater wireless optical communications (UWOC), impulse response is important to characterize channel properties. In this paper, we consider the impulse response for UWOC multiple-input single-output (MISO) links with a uniform circular array (UCA) of light sources. The Monte Carlo approach is adopted to achieve the impulse response of UWOC MISO links for the turbid water environment. We propose...
In this paper, we present some of the results of the Tallinn trials. The trials were part of the ARROWS (ARchaeological RObot systems for the World's Seas) FP7 project whose aims are to reduce the cost of the AUVs and sensors in order to generalize their use for underwater archaeological missions. To this end, we developed algorithms to improve the imagery resolution of wideband sonar systems with...
An innovative technique for the synthesis of a nonuniform sonar array with as few elements as possible is proposed. This paper introduces a new method for linear array pattern synthesis based on continuous compressive sensing (CCS). Given a reference pattern subject to aperture constraints, the proposed approach allows the exact solution of the positions of sonar sensors, whose number is maximally...
In underwater wireless optical communications (UWOC), impulse response is essential for performance evaluation and system design. However, most prior works on impulse response modeling for UWOC links utilize curve fitting of Monte Carlo simulation results and require remodeling once the link geometry or system configuration is changed. In this paper, we derive an analytical formula to model the single...
Model-based passive source localization is known to be quite sensitive to model mismatch. In this paper, we present a new implementation based on matched-mode processing. Specifically we formulate mode filtering as a convex optimization problem, and ℓ1-regularized least squares is applied, which is robust in terms of the numerical implementation. Simulations with respective full-depth and partially-spanned...
Spatial redundant sampling in stripmap SAS imaging is addressed in this paper, and the introduced aliasing is studied by theoretical and simulated results. An intuitive ambiguity suppression approach is proposed and validated. The provided relationship between redundant sampling and reconstructed image provides additional information for subsequent automatic target recognition in image processing.
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.