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To prolong the lifetime of wireless sensors network energy efficient transmission method is required so that energy consumption must be minimized while satisfying given throughput and delay requirements. In this paper, the authors analyze the performance of cooperative Multiple-Input Multiple-Output (MIMO) based communication in wireless sensors networks. In this paper, they analyze the transmission method and best modulation to minimize the total energy consumption required to send a given number of bits. They then extend their energy efficiency analysis of MIMO system to individual single antenna nods that cooperate to form multiple antenna transmitters or receivers.
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