I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, these ...

SQL Server is a relational database management system, or RDBMS, developed and marketed by Microsoft. A database in SQL Server is made up of a collection of tables that stores a specific set of ...

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Abstract: The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems. In ...