title: Taking advantage of multiple scattering to communicate with time-reversal antennas.
abstract: We present an experimental demonstration showing that, contrary to first intuition, the more scattering a mesoscopic medium is, the more information can be conveyed through it. We used a multiple input-multiple output configuration: a multichannel ultrasonic time-reversal antenna is used to transmit random series of bits simultaneously to different receivers which were only a few wavelengths apart. Whereas the transmission is free of error when multiple scattering occurs in the propagation medium, the error rate is huge in a homogeneous medium.
authors.affiliation: Laboratoire Ondes et Acoustique, ESPCI, Universite Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris, France.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Derode
authors.forename: Arnaud
authors.initials: A
authors.lastname: Tourin
authors.forename: Julien
authors.initials: J
authors.lastname: de Rosny
authors.forename: Mickaël
authors.initials: M
authors.lastname: Tanter
authors.forename: Sylvain
authors.initials: S
authors.lastname: Yon
authors.forename: Mathias
authors.initials: M
authors.lastname: Fink