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The analysis of the electromagnetic field statistics in an arched tunnel is presented. The investigation is based on experimental data obtained during extensive measurement campaigns in a frequency band extending from 2.8&#x2009;GHz up to 5&#x2009;GHz and for a range varying between 50&#x2009;m and 500&#x2009;m. Simple channel models that can be used for simulating MIMO links are also proposed

Propagation in Tunnels: Experimental Investigations and Channel Modeling in a Wide Frequency Band for MIMO Applications