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

Derode, Arnaud; Tourin, Arnaud; Rosny, Julien de; Tanter, Mickaël; Yon, Sylvain; Fink, Mathias

doi:10.1103/physrevlett.90.014301

Cited by 197 publications

(153 citation statements)

References 11 publications

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“…If the signal has a wide bandwidth, strong refocusing of the backpropagated signal could be achieved using a single element without need for an array. In a subsequent paper [15], they discussed the implication of this result for communications. The results presented in Fig.…”

Section: Frequency Diversity: Data-driven Simulationsmentioning

confidence: 99%

Acoustic Communication Using Time-Reversal Signal Processing: Spatial and Frequency Diversity

Rouseff¹,

Flynn²,

Ritcey³

et al. 2004

AIP Conference Proceedings

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Abstract. Time-reversal signal processing can be viewed as a form of matched filtering that operates both in time and in space. Acoustic communication represents a promising potential application of the processing. In designing a communications system, constraints are imposed by the available bandwidth and by the geometry of the time-reversal array. In the present paper, the interplay between bandwidth and array geometry is examined. If the bandwidth is large relative to the symbol rate, time -reversal processing can be successful with sparse arrays. If the array is well populated, the required bandwidth can be reduced. Results from experiments and data-driven simulations are presented.

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Section: Frequency Diversity: Data-driven Simulationsmentioning

confidence: 99%

Acoustic Communication Using Time-Reversal Signal Processing: Spatial and Frequency Diversity

Rouseff¹,

Flynn²,

Ritcey³

et al. 2004

AIP Conference Proceedings

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“…As it will be shown later, the residual correlation existing between mixed terms in (12) should not be neglected, lest we overestimate the actual performance of the transmission system. In order to compute these four sets of terms, it is necessary to consider the mutual moments W i (ν 1 )W j (ν 2 ) .…”

Section: Theory Of Peak and Energy Contrastsmentioning

confidence: 99%

Multiple-Source Time-Reversal Transmissions in Random Media

Cozza

Monsef²

2014

IEEE Trans. Antennas Propagat.

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Abstract-The ability of time-reversed signals in reproducing a given time-dependence of the electromagnetic field within random media is investigated. A general setup consisting of multiple sources cooperating in providing the best transmission is considered, where the constructive interference of their individual contributions is meant to improve the quality of the field generation with respect to a single-source setup. The medium response is described by means of tools from random-process theory, for the case of stationary media complex enough to ensure a large number of multi-path contributions. It is shown that even a very weak spatial coherence in the medium is sufficient to significantly hinder the improvement expected from the use of multiple-source scenarios. Experimental results obtained in a reverberation chamber support the validity of the proposed theory. Direct applications of these results can be found in recent proposals about the potential benefits of time-reversed signals used in wireless communications, imaging techniques, as well as in pulsed-field generation devices based on energy compression through dispersive media.

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“…The transmission coefficients are given by T ε (ω, −L, 0) = 1/a ε 1 (ω, 0) where a ε 1 satisfies (7) with the initial conditions (12). The asymptotic behavior of p tr as ε → 0 has been studied in [10,17,24].…”

Section: Transmitted Front Wavementioning

confidence: 99%

“…ultrasound, underwater acoustics, see for instance the review [13]. Important potential applications have been proposed in various fields, for instance imaging [22,14] and communication [12]. A time-reversal mirror is, roughly speaking, a device which is capable of receiving a signal in time, keeping it in memory and sending it back into the medium in the reversed direction of time.…”

Section: Introductionmentioning

confidence: 99%

Robustness of time reversal for waves in time-dependent random media

VIGO¹

2004

Journal of Mathematical Economics

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This paper addresses the impact of time fluctuations of a random medium on refocusing during a time-reversal experiment. Even in the presence of moderate timeperturbations a coherent refocused pulse is observed. The theory predicts the level of recompression observed as well as the conditions for the loss of statistical stabilization. It is shown that the statistical properties of the refocused pulse depend on a simple set of parameters that describe the correlation degree of the medium. The refocused pulse has in general a random shape that can be described in terms of a system of stochastic transport equations driven by a single Brownian motion. Pulse stabilization is also demonstrated for some particular configurations, and the convolution kernel that describes the pulse reshaping is explicitly computed. Numerical simulations are presented and show a very good agreement with the theoretical predictions, thus providing a clear illustration of the robustness of time reversal.

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

Cited by 197 publications

References 11 publications

Acoustic Communication Using Time-Reversal Signal Processing: Spatial and Frequency Diversity

Acoustic Communication Using Time-Reversal Signal Processing: Spatial and Frequency Diversity

Multiple-Source Time-Reversal Transmissions in Random Media

Robustness of time reversal for waves in time-dependent random media

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