A joint work between the University of Bologna (Luca De Marchi, Nicola Testoni and Federica Zonzini) and Goethe University Frankfurt (Chris Kexel and me) was accepted for publication in IEEE Access.
This paper demonstrates the use of guided elastic waves (GEW) for multiple-in and multiple-out (MIMO) data communication in the framework of a structural health monitoring (SHM) system. Therefore, miniaturized low-voltage communication nodes have been developed. They are arranged in a spatially distributed and permanently installed network. Wireless exchange of encoded information across a metallic plate and a stiffened carbon-fiber reinforced plastics (CFRP) structure is investigated. A combination of square-wave excitation sequences and frequency-division multiplexing (FDM) is explored for parallel communication with multiple nodes. Moreover, the impact of the excitation-sequence length on the reliability of information transmission is studied in view of future energy-aware application scenarios. The presented system achieves in both studied structures error-free transmission at a data rate of 0.17 kbps (per carrier frequency) with a power consumption of 224 mW.
Kexel, C.; Testoni, N.; Zonzoni, F.; Moll, J. & De Marchi, L., Low-power MIMO guided-wave communication, IEEE Access (accepted in November 2020), 2020