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.
This paper proposes and investigates a novel code-division multiple-access (CDMA) system. This two-layer spreading CDMA (TLS-CDMA) system can combat multiple-access interference (MAI) and multipath interference (MPI) simultaneously and effectively in a multiuser scenario over frequency-selective fading channels. Moreover, a two-layer cell-specific scrambling code is proposed for the TLS-CDMA system...
In this paper, we introduced a two-layer spreading CDMA (TLS-CDMA) system with overlap cut frequency domain equalization to seek higher throughput in uplink systems. The proposed system utilizes block spreading to combat multiple access interference (MAI) while frequency spreading removes residue interchip interference (ICI). Cyclic prefix (CP) is commonly inserted to mitigate inter block interference...
Multi-band ultra-wideband (MB-UWB) divides the available spectrum into multiple subbands, in which certain bands may be turned off to eliminate possible interference and coexistence problems with other wireless services using the same spectrum. Another possibility arising from MB-UWB is the assignment of different time-frequency subband hopping patterns to support simultaneously operating piconets...
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.