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.
Hierarchical modulation has advantage that has Improved efficiency. And advanced hierarchical modulation was proposed that enhanced layer symbols are rotated to improve system efficiency. But this conventional hierarchical modulation scheme has some problems such as reduction of minimum distance of inner symbols in constellation that have 2bit error. And only constellation rotation can not optimize...
For broadcast networks, the Single-Frequency Network (SFN) mode is an alternative to the well-known Multi-Frequency Network (MFN) mode, where instead of transmitters operating at different frequencies, all base stations use the same frequency. Besides the optimal frequency reuse, it is usually expected that the more homogeneous distribution of received signal strength reception in an SFN will improve...
The critical step in deploying a V2R system based on digital broadcast systems such as DAB or DVB-H is the estimation of its downlink capacity requirements. We present an entropy based model for the downlink capacity requirements that takes into consideration both the parameters of the fixed infrastructure of the V2R system, as well as the dynamic traffic conditions. This model is independent of 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.