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 inversion of the semi-analytical radiative tranfer model proposed by Lee allows to estimate the water column paramters and depth. The solution generally used to deal with the sea bottom reflectance at the inversion stage is to use a spectral library containing relevant reflectance spectra of the studied area. In this paper, we will evaluate the influence of that spectral library. For this purpose,...
We present in this letter a blind frame synchronization method based on a maximum a posteriori probability (MAP) approach. Applied to coded communication systems, this method is based on the calculation of the log-likelihood ratios (LLR) of the syndrome obtained according to the parity check matrix of the code. After presenting the proposed method, we compare it to an existing blind synchronization...
IEEE802.16e standard proposes a full-rate space-time block code (STBC) achieving the optimum compromise between diversity and multiplexing gains (scheme C). When applied on modulated and FEC encoded data, under the constraint of practical feasibility, we prove the necessity for an iterative turbo-like receiver to outperform the spatial multiplexing structure (scheme B). Exploiting the particular definition...
In decentralized communication schemes such as ad-hoc networks, a major challenge concerns the synchronization and detection of users sending information simultaneously. Classical synchronisation techniques based on training sequences decrease dramatically the spectral efficiency and are rarely applicable in non-cooperative settings. In this contribution, we propose an efficient technique for blind...
Canal coding can not nowadays be by passed. In order to decode the coded sequence, the receptor has to find the beginning of the codewords. This problem is usually solved by adding periodically to the transmit sequence a frame synchronization sequence. Of course the longer the sequence the better the synchronization but the less the spectral efficiency. We understand clearly the stakes of developing...
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.