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.
The design of frequency invariant beamformers for traditional tapped delay-line array system can be formulated as a convex optimization problem and solved efficiently using the interior-point methods. This approach is extended to the recently proposed broadband beamforming system with sensor delay-lines and some variations are proposed to cope with the specific requirements in the design. Design examples...
Digital correlation techniques are used in photon correlation spectroscopy (PCS) experiments to gain information about the diffusion coefficient and thereby the size and distribution of submicron particle structures in fluid media. This paper presents a photon correlation system implemented by high performance FPGA (Field Programmable Gate Array). Owning to the digital nature of photon counting, correlators...
The bandwidth performance of a two-element linearly constrained minimum variance beamformer with sensor delay-lines (SDLs) attached is studied in terms of the directions of the interference signals, the inter-spacing between delay-line sensors and the length of the SDL. Compared with broadband beamformers with tapped delay-lines (TDLs), the SDL-based structure performs better in two ways: its output...
A novel adaptive broadband beamforming structure is proposed, where the tapped delay-lines in the traditional broadband beamforming structure are replaced by sensor delay-lines and only one coefficient is required for each of the received sensor signals. In this way, the highspeed analogue tapped delay-lines or digital sampling circuits are not required any more for some broadband beam- forming applications...
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.