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.
A novel method to extract multiple input and multiple output (MIMO) chaotic signals using the blind extraction algorithm after transmitting in nonideal channel is proposed in this paper. In order to solve the multipath problem in the direct chaotic communication ultra wideband (UWB) system, a blind extraction algorithm based on higher-order statistic (HOS) technique to recover the primary chaotic...
The performances of pseudo-chaotic communication time-hopping UWB system with efficient modulation schemes are compared on the classic AWGN channel propagation and the realistic IEEE-UWB channel model. By employing different versions of modulation at the transmitters, the performances of an optimal receiver and a Rake receiver with various combining schemes are studied in this paper. The numerical...
Different modulation schemes of pseudo-chaotic time hopping for ultra-wideband (UWB) communication systems is proposed in this paper. An integral scheme with PPM, PAM and PAM-PPM modulation is presented. The theoretic analysis expressions of power spectral density of these three UWB signals for the three schemes are given. Compared with the theoretic expressions, the simulation results show that the...
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.