Energy optimisation of communication techniques between communicating objects

Abstract : Technological advances have resulted in the development of wireless sensor applications. The densely distributed sensors, generally used for data gathering, environmental monitoring, industrial automation or surveillance, involve often low data rates and low transmission ranges. Despite the progress in software and hardware technologies, the energy efficiency is still one of the important constraints for the design of Wireless Sensor Network (WSN). For wireless sensor applications, nodes are usually deployed with reduced energy resources and without capability of battery replacement. Several techniques could be used to minimize the energy consumption of WSN. In this thesis we focus the physical layer and we propose to reduce the energy consumption by using low energy coding schemes. Firstly, a study allows us to deduce that in AWGN channel, Minimum-Energy Coding based on OOK modulation is energy efficiency, but at the price of lower spectrum efficiency. Only the transmission power is considered and the consumption of electronic circuits is not taken into account. Then, different energy consumption models are introduced to achieve energy efficiency analysis using realistic devices. The fact that Minimum-Energy coding based on OOK improves the energy efficiency performance is confirmed and the limits of practical circuits are highlighted. At last, the network protocol is addressed by introducing the ARQ error control protocol. Finally, the energy efficiency of an autonomous remote control is improved by using OOK orthogonal modulation and a real demonstrator is realized.
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Yue Peng. Energy optimisation of communication techniques between communicating objects. Electronics. UNIVERSITE DE NANTES, 2015. English. ⟨tel-01250686⟩

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