Electromagnetic Signal and Information Theory – Electromagnetically Consistent Communication Models for the Transmission and Processing of Information
CoRR(2023)
摘要
In this paper, we present electromagnetic signal and information theory
(ESIT). ESIT is an interdisciplinary scientific discipline, which amalgamates
electromagnetic theory, signal processing theory, and information theory. ESIT
is aimed at studying and designing physically consistent communication schemes
for the transmission and processing of information in communication networks.
In simple terms, ESIT can be defined as physics-aware information theory and
signal processing for communications. We consider three relevant problems in
contemporary communication theory, and we show how they can be tackled under
the lenses of ESIT. Specifically, we focus on (i) the theoretical and practical
motivations behind antenna designs based on subwavelength radiating elements
and interdistances; (ii) the modeling and role played by the electromagnetic
mutual coupling, and the appropriateness of multiport network theory for
modeling it; and (iii) the analytical tools for unveiling the performance
limits and realizing spatial multiplexing in near field, line-of-sight,
channels. To exemplify the role played by ESIT and the need for electromagnetic
consistency, we consider case studies related to reconfigurable intelligent
surfaces and holographic surfaces, and we highlight the inconsistencies of
widely utilized communication models, as opposed to communication models that
originate from first electromagnetic principles.
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