Antenna design for ultra-wideband through wall radar

Zhao, Xingwen; Ye, Guang; Chang, Tianying; Liang, Cui; Wang, Zhuopeng; Hongquan, Fu

doi:10.1109/compcomm.2017.8322718

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Equation ( 30) serves as a prerequisite for Equation (29), which means that the relative position between two MAVs cannot be equal to zero. Equation (31) indicates that the MAVs cannot remain stationary. Both the conditions are obvious.…”

Section: System Observability Analysismentioning

confidence: 99%

“…In [27], a SLAM autonomous positioning algorithm combining magnetometer, IMU, and monocular camera was proposed to address the initialization instability and drift problem in the visual-inertial SLAM (VI-SLAM) algorithm. In wireless positioning, UWB technology is a potentially productive area of research [28][29][30] in multi-information fusion positioning due to its advantages such as strong penetration ability, low power consumption, small impact of multipath effects, and high positioning accuracy [31][32][33]. In [28], UWB ranging was used in an indoor positioning scenario, and the position was jointly estimated by fusing the ranging and IMU information through cooperative positioning, which reduced the position drift of Inertial Navigation System (INS).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the inherent error drift of IMU, relying solely on IMU for inertial navigation positioning is uncommon. Typically, the fusion of multi-sensor information is required to reduce the positioning errors [26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…Solely relying on IMU for dead reckoning cannot achieve long-term high-precision positioning [18][19][20][21][22]. When fusing with radio information, there are restrictions on MAV cooperative formation tasks, such as the existence of zero-velocity detection [31,33] and fixed reference anchor [33]. In addition, there is a situation where two MAVs cannot be positioned [32].…”

mentioning

confidence: 99%

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A Novel Ranging and IMU-Based Method for Relative Positioning of Two-MAV Formation in GNSS-Denied Environments

Cheng

Ren

Deng

2023

Sensors

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Global Navigation Satellite Systems (GNSS) with weak anti-jamming capability are vulnerable to intentional or unintentional interference, resulting in difficulty providing continuous, reliable, and accurate positioning information in complex environments. Especially in GNSS-denied environments, relying solely on the onboard Inertial Measurement Unit (IMU) of the Micro Aerial Vehicles (MAVs) for positioning is not practical. In this paper, we propose a novel cooperative relative positioning method for MAVs in GNSS-denied scenarios. Specifically, the system model framework is first constructed, and then the Extended Kalman Filter (EKF) algorithm, which is introduced for its ability to handle nonlinear systems, is employed to fuse inter-vehicle ranging and onboard IMU information, achieving joint position estimation of the MAVs. The proposed method mainly addresses the problem of error accumulation in the IMU and exhibits high accuracy and robustness. Additionally, the method is capable of achieving relative positioning without requiring an accurate reference anchor. The system observability conditions are theoretically derived, which means the system positioning accuracy can be guaranteed when the system satisfies the observability conditions. The results further demonstrate the validity of the system observability conditions and investigate the impact of varying ranging errors on the positioning accuracy and stability. The proposed method achieves a positioning accuracy of approximately 0.55 m, which is about 3.89 times higher than that of an existing positioning method.

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Section: System Observability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

A Novel Ranging and IMU-Based Method for Relative Positioning of Two-MAV Formation in GNSS-Denied Environments

Cheng

Ren

Deng

2023

Sensors

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A Review on Through-Wall Communications: Wall Characterization, Applications, Technologies, and Prospects

Jamshidi-Zarmehri,

Akbari,

Labadlia

et al. 2023

IEEE Access

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This paper underscores the paramount significance of through-wall communications by providing a comprehensive exploration of pivotal aspects like wall characterization, relevant technologies, versatile applications, and future prospects. Through-wall communication has the potential of being adopted in diverse fields, from indoor wireless communications, ground penetrating radar, through-wall radar imaging, to even power transmission. To augment the efficiency and reliability of signal detection, a whole variety of tools, such as antenna elements, frequency-selective structures, metasurfaces, and lenses, are exploited. By surveying the landscape of relevant technologies and applications in the existing literature, this paper serves as a beacon for researchers and engineers alike. Furthermore, it extends an invitation for pioneering exploration in this field, advocating the examination of tunable and adaptive systems, as well as the untapped potential of 3D printing in reshaping the future of through-wall communications. INDEX TERMSAntenna arrays, Bow-tie antennas, Frequency selective structures (FSSs), Ground penetrating radar (GPR), Horn antennas, Indoor communications, Lenses, Metamaterials, Metasurfaces, Microstrip antennas, Power transfer, Through-wall communications (TWC), Through-wall power transfer (TWPT), Through-wall radar imaging (TWRI), Vivaldi antennas. and Electronic Engineers (IEEE) [10] and International Commission on Non-Ionizing Radiation Protection (ICNIRP) [11] provide guidelines for power levels considering the safety of humans in the environment. Through-wall communication is employed in many applications like indoor propagation [12]-[17], ground penetration radars (GPR) [18]-[22], through-wall imaging radars (TWIR) [23]-[32], and power transmission through walls [33]-[39]. Stable signal coverage in indoor environments, including walls and other materials, is essential for indoor communications. With the introduction of the Internet of Things (IoT) and smart houses, electromagnetic waves with different operation frequencies propagate in buildings [17], [40], [41]. In these environments, through-wall communication aims to improve the reliability of the signal. Transmission of power through walls is another branch of TWC which has been investigated in literature [42]-[47].

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A Design of Microstrip Antenna for Through-wall Radar

Zhang

Wang

2022

2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Antenna design for ultra-wideband through wall radar

Cited by 6 publications

References 6 publications

A Novel Ranging and IMU-Based Method for Relative Positioning of Two-MAV Formation in GNSS-Denied Environments

A Novel Ranging and IMU-Based Method for Relative Positioning of Two-MAV Formation in GNSS-Denied Environments

A Review on Through-Wall Communications: Wall Characterization, Applications, Technologies, and Prospects

A Design of Microstrip Antenna for Through-wall Radar

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