Capacity of Fading Gaussian Channel with an Energy Harvesting Sensor Node

Details Capacity of Fading Gaussian Channel with an Energy Harvesting Sensor Node Capacity of Fading Gaussian Channel with an Energy Harvesting Sensor Node

2010-10-26

arxiv.org/abs/1010.5416v2

Computer Science

Information Theory

6 Pages, To be presented at IEEE GLOBECOM 2011

Scientific paper

Network life time maximization is becoming an important design goal in wireless sensor networks. Energy harvesting has recently become a preferred choice for achieving this goal as it provides near perpetual operation. We study such a sensor node with an energy harvesting source and compare various architectures by which the harvested energy is used. We find its Shannon capacity when it is transmitting its observations over a fading AWGN channel with perfect/no channel state information provided at the transmitter. We obtain an achievable rate when there are inefficiencies in energy storage and the capacity when energy is spent in activities other than transmission.

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