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The objective of this reported work was to characterise electromagnetic wave propagation between adjacent rooms in the lower deck areas of ships. A wideband multiple-input multiple-output channel sounder has been used to realise double directional propagation measurements at 2.2 GHz. The antenna configuration was a linear array at the transmission side and a rectangular one at the reception. The measurement data are first processed with a classic beamforming technique, then with a high resolution algorithm to extract the dominant paths. A ray-tracing based simulation tool is used to understand the measurement results. It is observed that, in spite of the metallic structure of watertight doors, wireless communication remains possible between adjacent rooms after door closure. Results show that electromagnetic waves mainly propagate through door edges openings. [ABSTRACT FROM AUTHOR]

In the open literature on the geometric modelling of wireless radiowave landmobile propagation channels, this reported work is the first to attempt to account for the propagation power loss of the multipaths, in deriving closed-form expressions for an uplink received-signal's spatial-correlation-coefficient function across the aperture of a base-station antenna-array. [ABSTRACT FROM AUTHOR]

Simulation results for the capacity distribution of an indoor multiple input multiple output (MIMO) communications system are presented. Results are based on ray traced propagation data for micro- and macro-MIMO array configurations. Capacity levels are compared with well-known mathematical results for uncorrelated Rayleigh fading. Significant capacity gains are seen using a macro-MIMO configuration. [ABSTRACT FROM AUTHOR]

Watertight metallic doors are no barrier to installing wireless networks inside a ship, according to researchers at the Institute of Telecommunications of Rennes (IETR), France. In their Letter published in this issue of Electronics Letters, they experimentally demonstrate how radio leakage between metallic adjacent rooms separated by watertight doors is of a sufficient level for communication between network nodes in a wireless sensor network (WSN). This result is another step towards a cost-effective wireless solution for future shipboard monitoring systems. [ABSTRACT FROM AUTHOR]