JOURNAL OF COMMUNICATIONS (JCM)

ISSN : 1796-2021

Volume : 4 Issue : 4 Date : May 2009

**Modeling and Understanding MIMO Propagation in Tunnels**

Jose-Maria Molina-Garcia-Pardo, Martine Lienard, Paul Stefanut, and Pierre Degauque

Page(s): 241-247

Full Text: PDF (462 KB)

**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.

**Index Terms**

MIMO, propagation, information theory, modal theory, measurements.

ISSN : 1796-2021

Volume : 4 Issue : 4 Date : May 2009

Page(s): 241-247

Full Text: PDF (462 KB)

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.