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.
Direction of arrival (DOA) estimation is of great importance to signal processing, and, as a consequence, various arrays have recently been studied to get good DOA estimation performance. Particularly, spherical arrays have the advantage of three-dimensional orientation which benefits three-dimensional processing and analysis. Also, spherical symmetric structure of spherical arrays could promote the...
It is often crucial in most of today's Autonomous Underwater Vehicles (AUVs) missions that the vehicle position be known precisely. Navigation performance of an Aided Inertial Navigation System (AINS) is always limited by the accuracy of sensors. In this paper we focus on enhancing performance of the AINS via micronavigation, which exploits a so-called Displaced Phase Center Antenna (DPCA) technique...
For a Multi-Beam Echo Sounder (MBES) operating in very shallow water environments or close to seafloor, near-field beamforming shall be used to estimate the direction and range of the backscattering sources along the bottom. The most common beamforming method is the so-called weight-delay-sum (WDS) beamformer. In this paper, we present an approximation method to calculate time delays between individual...
This paper presents an extension of the Cognitive Pilot Channel (CPC) concept to the case of a distributed version thereof (namely, DCPC), and demonstrates a potential instantiation of this concept in the design of Smart Femto-Cell Controllers (SFC-C) for handling the management of co-existing homogeneous or heterogeneous networks. Instead of covering the various networks by a single CPC, the novel...
Beamforming as a basic approach of array signal processing has been widely used in many important applications such as radar, sonar, and communications. Typical algorithms include time-delay-based and FFT-based, and various implementation structures have been developed. For bandpass sampled signals, a true time-delay beamformer involves three processes: signal demodulation to obtain its complex envelop;...
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.