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Modeling and Understanding MIMO Propagation in Tunnels

Authors
Publisher
ACADEMY PUBLISHER
Publication Date
Keywords
  • Mimo
  • Propagation
  • Information Theory
  • Modal Theory
  • Measurements.
Disciplines
  • Physics

Abstract

This paper first presents an application of the modal theory for interpreting experimental results of the electromagnetic field variation along a tunnel. The transmitting frequency is assumed to be high enough so that the tunnel behaves as an oversized waveguide. Then, for a Multiple-Input Multiple-Output channel, theoretical results of the channel capacity are given. To explain the decrease of the capacity at large distance from the transmitter, even by assuming a constant signal to noise ratio, an approach based on the calculation of the eigenvalues of the transfer matrix in a reference scenario is described.

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