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.
In this work, a Semi-Blind Polarization Adaption (SBPA) technique that utilizes the sampled primary signals and channel reciprocity is proposed for cognitive users. The proposed technique can adjust transmit polarization without any prior information, while the channel state information is only necessary for deriving the receive polarization. This is a significant difference between the proposed technique...
Spectrum opportunities in time, space and power domain are exploited by secondary users in traditional cognitive radio studies. While spectrum opportunities in polarization domain, namely simultaneous utilization of spectrum between primary and secondary system with polarization signal characteristics, is exploited inadequately. With the merits of polarization mismatch, primary system lies in the...
In order to utilize TV White Space (TVWS) by deploying the cognitive radio technology and eliminate interference to digital television (DTV) system, some researches set extra isolation which may reduce spectrum efficiency. In this study, power control is used. However, the existing TD-LTE power control algorithms are not proper for the coexistence of TD-L TE and DTV systems because the interference...
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.