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Phys. Rev. Lett. 90, 014301 (2003) [4 pages]

Taking Advantage of Multiple Scattering to Communicate with Time-Reversal Antennas

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Arnaud Derode, Arnaud Tourin, Julien de Rosny, Mickaël Tanter, Sylvain Yon, and Mathias Fink
Laboratoire Ondes et Acoustique, ESPCI, Universite Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris, France

Received 22 July 2002; published 10 January 2003

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.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.014301
DOI:
10.1103/PhysRevLett.90.014301
PACS:
43.20.+g, 42.25.Dd, 72.10.Fk, 84.40.Ua
 
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