Mutual Information Maximization for a Wireless Energy Harvesting Node Considering the Circuitry Power Consumption

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An energy harvesting transmitter operating in a point-to-point link through a discrete time fading channel is considered in this paper. Assuming non-causal knowledge of the harvested energy and channel state, the resource allocation that maximizes the mutual information is investigated by considering both the radiated power and the circuitry power consumption. A resource allocation strategy that asymptotically maximizes the mutual information along N independent channel accesses is derived. The boxed water-flowing graphical interpretation is presented, which intuitively depicts the asymptotically optimal resource allocation.