Feedback enhances simultaneous energy and information transmission in multiple access channels
Article 2016 en
Authors
SA
Selma Belhadj Amor
SP
Samir M. Perlaza
IK
Ioannis Krikidis
Abstract
1 min read
In this paper, the fundamental limits of simultaneous information and energy transmission in the two-user Gaussian multiple access channel with feedback are fully characterized. A simple achievability scheme based on power-splitting and Ozarow's scheme is shown to be optimal. Finally, the maximum individual information rates and the information sum-capacity that are achievable given a minimum energy rate constraint of b energy-units per channel use at the input of the energy harvester are identified. An interesting conclusion is that for a fixed information transmission rate, feedback can at most double the energy transmission rate with respect to the case without feedback.
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