Advances in GNSS Positioning and GNSS Remote Sensing

Yasyukevich, Yury V.; Zhang, Baocheng; Devanaboyina, Venkata Ratnam

doi:10.3390/s24041200

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The most common methods include external positioning systems, such as the Global Positioning System (GPS) [9,10] and anchor-based ultra-wideband (UWB) positioning [11,12], which have notably enhanced positioning accuracies. However, in specific environments, such as urban canyons, indoors, or during severe weather conditions, satellite signals may be obstructed or interfered with, thereby limiting the reliability and accuracy of traditional Global Navigation Satellite Systems (GNSSs) [13,14] in these situations. Furthermore, the deployment of an external positioning system can lead to complexities in maintenance and updating.…”

Section: Introductionmentioning

confidence: 99%

Relative Localization and Circumnavigation of a UGV0 Based on Mixed Measurements of Multi-UAVs by Employing Intelligent Sensors

Guo,

Gan,

2024

Sensors

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Relative localization (RL) and circumnavigation is a highly challenging problem that is crucial for the safe flight of multi-UAVs (multiple unmanned aerial vehicles). Most methods depend on some external infrastructure for positioning. However, in some complex environments such as forests, it is difficult to set up such infrastructures. In this paper, an approach to infrastructure-free RL estimations of multi-UAVs is investigated for circumnavigating a slowly drifting UGV0 (unmanned ground vehicle 0), where UGV0 serves as the RL and circumnavigation target. Firstly, a discrete-time direct RL estimator is proposed to ascertain the coordinates of each UAV relative to the UGV0 based on intelligent sensing. Secondly, an RL fusion estimation method is proposed to obtain the final estimate of UGV0. Thirdly, an integrated estimation control scheme is also proposed for the application of the RL fusion estimation method to circumnavigation. The convergence and the performance are analyzed. The simulation results validate the effectiveness of the proposed algorithm for RL fusion estimations and of the integrated scheme.

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Section: Introductionmentioning

confidence: 99%

Relative Localization and Circumnavigation of a UGV0 Based on Mixed Measurements of Multi-UAVs by Employing Intelligent Sensors

Guo,

Gan,

2024

Sensors

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“…Global navigation satellite system (GNSS) receivers have been employed in many areas, such as autonomous navigation, transport monitoring, and so on [1]. Now, the positioning accuracy of some GNSS receivers can reach the centimeter level [2].…”

Section: Introductionmentioning

confidence: 99%

Kalman Filter with Adaptive Covariance Estimation for Carrier Tracking under Weak Signals and Dynamic Conditions

Cheng,

Zhang,

Wang

et al. 2024

Electronics

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Kalman filtering (KF)-based tracking has been commonly employed in global navigation satellite system (GNSS) receivers to achieve robust tracking. However, under more serious conditions, such as severe strength attenuation and abrupt dynamic coexisting environments, it is difficult for KF-based tracking to keep tracking well due to the fixed noise statistics. To further enhance the carrier tracking performance, this paper proposes an adaptive KF carrier tracking method for resisting signal strength fading and high dynamic environments. The proposed method introduces the adaptive factor to adjust the process noise covariance to accommodate the noise statistics in actual variable situations. Moreover, we apply the chi-square hypothesis test to detect system stability. The adaptive factor is only applied when the system is not stable, which can enhance computational efficiency. The proposed method is conducted in the GPS L1 software receivers. According to the results, the proposed algorithm can improve the robustness in tracking performance compared with other tracking methods under signal serious fading and high dynamic conditions. Using the proposed method, GNSS receivers’ navigation performance can be improved under complex conditions.

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Image-based intrusion detection system for GPS spoofing cyberattacks in unmanned aerial vehicles

Korium,

Saber,

Ahmed

et al. 2024

Ad Hoc Networks

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Advances in GNSS Positioning and GNSS Remote Sensing

Abstract: Scientists and engineers use data utilize global navigation satellite systems (GNSSs) for a multitude of tasks: autonomous navigation, transport monitoring, construction, GNSS reflectometry, GNSS ionosphere monitoring, etc [...]

Cited by 3 publications

References 23 publications

Relative Localization and Circumnavigation of a UGV0 Based on Mixed Measurements of Multi-UAVs by Employing Intelligent Sensors

Relative Localization and Circumnavigation of a UGV0 Based on Mixed Measurements of Multi-UAVs by Employing Intelligent Sensors

Kalman Filter with Adaptive Covariance Estimation for Carrier Tracking under Weak Signals and Dynamic Conditions

Image-based intrusion detection system for GPS spoofing cyberattacks in unmanned aerial vehicles

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