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Virtual Multiple Input Multiple Output (MIMO) techniques are used for energy efficient communication in wireless sensor networks. The authors investigate virtual MIMO for fixed and variable rates. They propose energy efficient routing based on virtual MIMO. The simulation results show that virtual MIMO based routing is more energy efficient as compared to SISO (Single Input Single Output) for larger distances. In recent years, virtual MIMO has attracted a growing interest because of its energy efficiency in large field of networks. In virtual MIMO network, a group of sensors cooperate to transmit and receive data.
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