Serena Williams has issued a touching message to her older sister Venus after the tennis icon married her Italian actor partner Andrea Preti over the weekend. The happy couple held six days of ...

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Marshall Hargrave is a stock analyst and writer with 10+ years of experience covering stocks and markets, as well as analyzing and valuing companies. A merger combines two companies into one.

Abstract: 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, ...