A target tracking method with a single antenna using time-reversal UWB radar imaging in a multi-path environment

Sakamoto, Takuya; Sato, Toru

doi:10.1109/igarss.2010.5651530

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…Impulse radio ultrawideband (IR-UWB) technique, which yields the advantages of a high data rate, low power consumption, low computational complexity, low power spectrum, and great immunity to multipath fading, has been widely applied in various fields, e.g., radar, location, and wireless communications [1][2][3][4][5]. An IR-UWB signal has great potential in precise positioning applications due to its extremely narrow pulse width [6].…”

Section: Introductionmentioning

confidence: 99%

TOA and DOA Estimation for IR‐UWB Signals: An Efficient Algorithm by Improved Root‐MUSIC

2021

Wireless Communications and Mobile Computing

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The automatically paired time of arrival (TOA) and direction of arrival (DOA) can be jointly estimated via a high-precision multidimensional spectral peak search- (SPS-) based multiple signal classification (MUSIC) algorithm in the impulse radio ultrawideband (IR-UWB) positioning system, while heavy computational burden is required. To tackle this issue, we propose an improved root-MUSIC algorithm for joint TOA and DOA estimation. After modelling the frequency domain form of the received signal, the algorithm first uses the signal subspace to establish the relationship between the two antennas. Then, the MUSIC spatial spectrum function is reconstructed with this relation, which enables it to offer a spectrum function in regard to the one-dimensional (1D) parameter of time delay. For further reducing the complexity, the TOA estimates of one antenna are obtained via 1D polynomial root finding instead of SPS, and the TOA estimates of the other antenna can be calculated by the established relationship. Finally, the DOA estimation can be achieved with the estimated TOAs. Due to the relationship between two antennas with signal subspace, the parameters estimated by the proposed algorithm are autopaired. Numerical simulations substantiate the superiority of the proposed algorithm.

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Section: Introductionmentioning

confidence: 99%

TOA and DOA Estimation for IR‐UWB Signals: An Efficient Algorithm by Improved Root‐MUSIC

2021

Wireless Communications and Mobile Computing

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“…e ultra-wideband (UWB) technique is a kind of wireless communication technology which uses nanosecond or even sub-nanosecond pulses as carrier to transmit information. Benefiting from the high transmission rate, low power consumption, and the anti-multipath characteristics, the UWB system has been widely applied in various fields such as radar, imaging, and positioning [1][2][3]. Due to the extremely narrow pulse, the positioning precision of the UWB system can reach centimeter level or even millimeter level.…”

Section: Introductionmentioning

confidence: 99%

Joint TOA and DOA Estimation for UWB Systems with Antenna Array via Doubled Frequency Sample Points and Extended Number of Clusters

Gong

Zhang

et al. 2021

Mathematical Problems in Engineering

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The ultra-wideband (UWB) system, which transmits information using nanosecond or even sub-nanosecond pulses, has been widely applied in precise positioning. In this paper, we investigate the problem of the time of arrival (TOA) estimation and the direction of arrival (DOA) estimation in the UWB systems with antenna array and propose a joint TOA and DOA estimation algorithm with doubled frequency sample points and extended number of clusters. Specifically, the proposed algorithm uses two antennas to receive impinging signals and utilizes the conjugate symmetry characteristic of the delay matrices to extend the sample points as well as the number of clusters. Moreover, in order to obtain TOA estimates with low computational complexity, the proposed algorithm transforms the two-dimensional (2D) spectral search to one-dimensional (1D) searches. The DOA estimates can then be achieved by using the TOA estimation results and the geometric information. Simulation results are given to testify the performance of the proposed algorithm.

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“…The TR technique has been proposed for about 30 years and used in various applications such as underwater sound [24], ultrasound [25,26] and electromagnetism [27][28][29][30][31][32][33] etc. TR can effectively improve radar imaging [27,28], direction-of-arrival (DOA) estimation [29,30], detection and other performance [31][32][33]. TR programme involves two processes, that is, forward and backward transmission, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Target detection based on time reversal with polarisation array antennas

Zhang

Chen

Yang

et al. 2021

IET Radar Sonar & Navi

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Polarisation diversity radar enhances the performance of target detection. Time reversal exploits the multipath effect by adaptively matching propagation channels to improve the signal-to-noise ratio (SNR) and realise high detectability. This work combines polarisation diversity and time-reversal technology to propose a time-reversal detector suitable for a polarisation array radar. The maximum likelihood estimate is carried out for the timevarying channel response to solve the channel mismatch problem, which may cause the degradation of time-reversal performance. In addition, a conventional polarisation detector is developed under the same varying channel scenario to benchmark the timereversal detector, and furthermore, the SNR gain of the time-reversal detector over the conventional detector is derived. Numerical simulations demonstrate the superiority of the time-reversal detector. Both the polarisation detectors proposed can take advantage of the channel variations to improve the detectability, and the greater the energy brought by the channel changes, the better the detection performance achieved.

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A target tracking method with a single antenna using time-reversal UWB radar imaging in a multi-path environment

Cited by 5 publications

References 4 publications

TOA and DOA Estimation for IR‐UWB Signals: An Efficient Algorithm by Improved Root‐MUSIC

TOA and DOA Estimation for IR‐UWB Signals: An Efficient Algorithm by Improved Root‐MUSIC

Joint TOA and DOA Estimation for UWB Systems with Antenna Array via Doubled Frequency Sample Points and Extended Number of Clusters

Target detection based on time reversal with polarisation array antennas

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