A Numerical Study on Time- Reversal Electromagnetic Wave for Indoor Ultra-Wideband Signal Transmission

Xiao, Shaoqiu; Chen, Jian; Wang, Bing‐Zhong; Liu, Xiaofei

doi:10.2528/pier07082501

Cited by 52 publications

(36 citation statements)

References 18 publications

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“…For the sake of saving space, more detailed knowledge about TRM is not mentioned here, the interested reader may consult the references [33][34][35][36][37][38][39][40][41]. [34,35] give the mathematical analysis in one-dimensional or layered media and [33] for three dimensional acoustic waves in random media.…”

Section: Time Reversal Mirror (Trm) Techniquementioning

confidence: 99%

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Evaluation of TRM in the Complex Through Wall Environment

Zheng¹,

Zhao

Nie³

et al. 2009

PIER

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Abstract-Practical interests arising from behind-the-wall target detection, surveillance and reconnaissance et al. claim for high capability of imaging in complicated environments. Time Reversal Mirror (TRM) technique, making use of the principle of reciprocity, emerges as a promising way to deal with such complex problem. In this paper, we investigate TRM in the ultra-wideband (UWB) through wall radar imaging (TWRI) through numerical simulation. The probing region is a square room, with walls of rough surface and random media parameters. TRM is used to image the target settled in the room. We evaluate the degradation of the images when the aperture of the array is decreased or the received signals are contaminated by noises. The back projection (BP) algorithm is employed here as a comparison for imaging quality. For the case in which the random walls are changed between the forward and inverse phase of time reversal, we check the imaging stability and applied an averaged Green's function to improve the imaging quality. Finally, some interesting conclusions are drawn.

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Section: Time Reversal Mirror (Trm) Techniquementioning

confidence: 99%

“…[36,37] show the self-averaging and statistical stability properties of time reversal. [38][39][40][41] report some new achievements of TRM in applications (such as application in the Microwave-Induced Thermo-Acoustic Tomography (MI-TAT) for early breast cancer detection).…”

Section: Time Reversal Mirror (Trm) Techniquementioning

confidence: 99%

Evaluation of TRM in the Complex Through Wall Environment

Zheng¹,

Zhao

Nie³

et al. 2009

PIER

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show abstract

“…TRM technique is widely regarded as a powerful method to image and detect targets in the complex environments. For the sake of saving space, more detailed knowledge about TRM is not mentioned here, the interested reader may consult the References [18,[34][35][36][37][38][39][40][41][42]. [18] presented the physical experiments, [35,36] gave the mathematical analyzes in one-dimensional and layered media and [34] for three dimensional acoustic and electromagnetic waves in random media.…”

Section: Time Reversal Mirror (Trm) Techniquementioning

confidence: 99%

“…[37,38] show the self-averaging and statistical stability properties of time reversal. [39][40][41][42] reported some new applications of TRM (such as application in the Microwave-Induced Thermo-Acoustic Tomography (MI-TAT) for early breast cancer detection).…”

Section: Time Reversal Mirror (Trm) Techniquementioning

confidence: 99%

Application of TRM in the Uwb Through Wall Radar

Zheng¹,

Zhao²,

Nie³

2008

PIER

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Abstract-Time Reversal Mirror (TRM) technique, in the virtue of its high resolution in the heterogeneous media, has been widely applied in the area of acoustics and electromagnetics. In this paper, the technique is developed to imaging targets in the contest of ultra-wideband (UWB) through wall radar (TWR) through numerical simulation. We firstly consider the technique to image targets behind a single-layered wall and then extend to the multi-layered wall. The simulation results have reported the imaging capability of the algorithm and its powerful use for TWR imaging. For concerning the image stability, we investigate the TRM images for the case in which there is a mismatch between the walls associated with the forward and inverse phases of time reversal. The back projection imaging algorithm is compared here at the same time for a contrast of the imaging quality. Finally, some conclusions are drawn.

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“…A traditional UWB technology is based on single-band systems employing carrier-free communications [4][5][6]. Recently, multi-band orthogonal frequency division multiplexing (MB-OFDM) systems have attracted much research attention and have been adopted as standards for the high-rate UWB physical layer [4].…”

Section: Introductionmentioning

confidence: 99%

Pilot and Data Symbol-Aided Frequency Estimation for Uwb-Ofdm

You¹,

Kim²

2009

PIER

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Abstract-In this paper, an improved residual carrier frequency offset estimation scheme is proposed for ultra-wideband multiband orthogonal frequency division multiplexing (UWB-OFDM) systems. The basic idea of our approach is based on the fact that two adjacent OFDM symbols convey identical information in an UWB-OFDM system. The mean square error of the synchronization scheme is derived, and its simple expression is also calculated. Finally, simulation results are demonstrated to verify the theoretical analysis in this paper.

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A Numerical Study on Time- Reversal Electromagnetic Wave for Indoor Ultra-Wideband Signal Transmission

Cited by 52 publications

References 18 publications

Evaluation of TRM in the Complex Through Wall Environment

Evaluation of TRM in the Complex Through Wall Environment

Application of TRM in the Uwb Through Wall Radar

Pilot and Data Symbol-Aided Frequency Estimation for Uwb-Ofdm

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