Energy efficiency evaluation of alternative MIMO - based sensor networks
نویسندگان
چکیده
Low-cost and low-power sensor nodes forming Wireless Sensor Networks (WSNs) have become suitable for a wide range of applications during recent years. These networks, due to their special functional characteristics, demand the implementation of energy-aware techniques in all layers. Recently a MIMO – based structure has been proposed to offer enhanced energy savings in WSNs under certain circumstances. Based on that idea several alternatives have been examined, mainly focusing on 2x2 MIMO systems. In this paper, we summarize two MIMO schemes and compare their performance in terms of energy efficiency. Moreover, we investigate more complex MIMO systems, emphasizing on 4x4 structures, and prove that depending on the scenario, such systems may offer remarkable energy gains. Index Terms –Energy efficiency, Multiple-Input-MultipleOutput systems, Wireless Sensor Networks
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