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Diffuse field cross-correlation in a programmable-metasurface-stirred reverberation chamber

Abstract : Programmable metasurfaces can endow complex scattering environments with reconfigurability. Here, we make use of these configurational degrees of freedom to retrieve the impulse response between two passive antennas via cross-correlation techniques. An ensemble of stirred chaotic wave fields in a reverberation chamber (RC) can play the role of thermal noise in passive Green's function retrieval. Instead of using a conventional mechanical mode stirrer, we generate the ensemble of RC configurations with random configurations of a programmable metasurface. We adapt the data processing of the diffuse field cross-correlation technique to this stirring mechanism, which is, given the size of the RC, nominally inefficient, and we investigate the convergence of the cross-correlated signals toward the impulse response. Finally, we apply our scheme to phaseless imaging in complex propagation environments, with potential applications in indoor context-awareness.
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https://hal.archives-ouvertes.fr/hal-03189023
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Tuesday, June 22, 2021 - 4:54:58 PM
Last modification on : Tuesday, October 19, 2021 - 10:36:38 PM
Long-term archiving on: : Thursday, September 23, 2021 - 7:05:42 PM

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Philipp del Hougne, Jérôme Sol, Fabrice Mortessagne, Ulrich Kuhl, Olivier Legrand, et al.. Diffuse field cross-correlation in a programmable-metasurface-stirred reverberation chamber. Applied Physics Letters, American Institute of Physics, 2021, 118 (10), pp.104101. ⟨10.1063/5.0039596⟩. ⟨hal-03189023⟩

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