Multipath Imaging for NLOS Targets Behind an L-Shaped Corner With Single-Channel UWB Radar

Tang, Quan; Li, Jun; Wang, Lingyu; Jia, Yong; Cui, Guolong

doi:10.1109/jsen.2021.3131665

Cited by 20 publications

(5 citation statements)

References 31 publications

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“…Ref. [18] conducts air-to-ground measurements in an open environment based on 5G-NR waveforms, and analyzes angular characteristics of sensing channel; In [19], a radar multipath model is proposed, and amplitude and Doppler characteristics of sensing channel in indoor corner scenario are analyzed; Ref. [20] extracts channel parameters based on 28 GHz outdoor measurement and introduces metal scatterers to investigate impact of interference on sensing channels.…”

Section: A Related Workmentioning

confidence: 99%

A General Channel Model for Integrated Sensing and Communication Scenarios

Zhang

et al. 2023

IEEE Commun. Mag.

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The emerging 6G network envisions integrated sensing and communication (ISAC) as a promising solution to meet growing demand for native perception ability. To optimize and evaluate ISAC systems and techniques, it is crucial to have an accurate and realistic wireless channel model. However, some important features of ISAC channels have not been well characterized, for example, most existing ISAC channel models consider communication channels and sensing channels independently, whereas ignoring correlation under the consistent environment. Moreover, sensing channels have not been well modeled in the existing standard-level channel models. Therefore, in order to better model ISAC channel, a cluster-based statistical channel model is proposed in this paper, which is based on measurements conducted at 28 GHz. In the proposed model, a new framework based on 3GPP standard is proposed, which includes communication clusters and sensing clusters. Clustering and tracking algorithms are used to extract and analyze ISAC channel characteristics. Furthermore, some special sensing cluster structures such as shared sensing cluster, newborn sensing cluster, etc., are defined to model correlation and difference between communication and sensing channels. Finally, accuracy of the proposed model is validated based on measurements and simulations.

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Section: A Related Workmentioning

confidence: 99%

A General Channel Model for Integrated Sensing and Communication Scenarios

Zhang

et al. 2023

IEEE Commun. Mag.

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“…In this paper, the UWB system that offers distinct advantages such as unique identification of specific targets and robust operation unaffected by light is used to locate the target (Kok et al , 2015; Deremetz et al , 2020; Wei et al , 2022). Despite the advantages of UWB, large measurement errors may occur when the target is occluded by walls, especially when the target turns around corner (Tang et al , 2022). To this end, our system will plan a stable following path based on the target’s position before occlusion, combined with the positions of walls which are obtained by the system’s environmental perception module.…”

Section: Introductionmentioning

confidence: 99%

A robust human target following system in corridor environment based on wall detection

Li,

2023

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Purpose In corridor environments, human-following robot encounter difficulties when the target turning around at the corridor intersections, as walls may cause complete occlusion. This paper aims to propose a collision-free following system for robot to track humans in corridors without a prior map. Design/methodology/approach In addition to following a target and avoiding collisions robustly, the proposed system calculates the positions of walls in the environment in real-time. This allows the system to maintain a stable tracking of the target even if it is obscured after turning. The proposed solution is integrated into a four-wheeled differential drive mobile robot to follow a target in a corridor environment in real-world. Findings The experimental results demonstrate that the robot equipped with the proposed system is capable of avoiding obstacles and following a human target robustly in the corridors. Moreover, the robot achieves a 90% success rate in maintaining a stable tracking of the target after the target turns around a corner with high speed. Originality/value This paper proposes a human target following system incorporating three novel features: a path planning method based on wall positions is introduced to ensure stable tracking of the target even when it is obscured due to target turns; improvements are made to the random sample consensus (RANSAC) algorithm, enhancing its accuracy in calculating wall positions. The system is integrated into a four-wheeled differential drive mobile robot effectively demonstrates its remarkable robustness and real-time performance.

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“…One of the research hotpots in indoor multipath is multipath utilization, and the core of this type of research is mainly to use multipath signals to estimate the position of targets in non-line-of-sight (NLOS) areas [11][12][13], in order to estimate building layout [14,15] and so on. Another is the suppression of multipath signals.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromagnetic Wave and Multipath Suppression from Overhead Perspective

Luo,

Zhang,

Ren

et al. 2023

Remote Sensing

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The multipath problem in indoor target detection has always been a long-standing research hotspot. Although there are many solutions to the multipath problem in a horizontal line of sight, the multipath problem of single-station radar from an overhead perspective still needs to be solved. At present, there is a lack of detailed analysis on the multipath propagation law of electromagnetic waves from an overhead perspective. This paper first analyzes the multipath propagation law of overhead perspective and reveals a combination multipath propagation phenomenon that is easily overlooked, which is formed by walls, ground, and targets. In addition, during the analysis process, the influence of coherent sources generated by multipath on angle estimation was fully considered, and verified through simulation and measured data. Then, based on the result of propagation analysis, this paper proposes a multipath ghost target suppression method. This method first establishes a multipath ghost target location dictionary based on building information, and then matches the tracking results with the dictionary to suppress successfully matched multipath ghost targets. Finally, several experiments are carried out to verify the effectiveness of this method.

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Multipath Imaging for NLOS Targets Behind an L-Shaped Corner With Single-Channel UWB Radar

Cited by 20 publications

References 31 publications

A General Channel Model for Integrated Sensing and Communication Scenarios

A General Channel Model for Integrated Sensing and Communication Scenarios

A robust human target following system in corridor environment based on wall detection

Analysis of Electromagnetic Wave and Multipath Suppression from Overhead Perspective

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