Results 61 to 70 of about 387 (165)
Journal of Information and TelecommunicationReconfigurable intelligent surfaces (RISs) are anticipated to constitute a critical component of forthcoming communication networks due to their ability to establish controllable wireless environments.
Abdulrahaman Kh. Alhafid +2 more
doaj +1 more source
Advances in Civil Engineering, Volume 2024, Issue 1, 2024.Reservoirs are highly relevant infrastructure assets, and now, more than ever, they play an essential role in society’s welfare and national security. Their importance is related to regional socioeconomic development due to their capacity to store water for different uses, such as human consumption, agricultural irrigation, flood control, and ...
Fabiola D. Yépez-Rincón +8 more
wiley +1 more source
A geometric dilution of precision based 3D indoor positioning scheme
上海师范大学学报. 自然科学版, 2017 A geometric dilution of precision(GDOP) based 3D indoor positioning scheme was proposed for the layout of anchor nodes.Through the proposed scheme,the biconical configuration could be obtained.The performance of the scheme was evaluated by utilizing two ...
Yang Ming, Liu Zhongling, Yu Hui
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The Journal of Engineering, 2019 In the passive coherent location system with fixed observers, the target tracking performance is limited by the inappropriate localisation geometry. This study proposes an adaptive observer trajectory optimisation (AOTO) algorithm in terms of minimising ...
Tong Jing, Wei Tian, Gaoming Huang
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General analytical formula of GDOP for TOA target localisation
Electronics Letters, 2018 For original 2D time‐of‐arrival (TOA) target localisation, since the unknown parameters containing a specific time of the signal that the target transmits, the unknown vector to be estimated is inherently with 3D frame, which makes the analytical characterisation of the geometric dilution of precision (GDOP) more challenging and the problem remains ...
Yin‐Ya Li +2 more
openaire +1 more source
Leida xuebao, 2015 A passive location method with one transmitter and one receiver using Direction Of Arrival (DOA) and Doppler measurements is proposed in this paper. The optimal trajectory analysis for the receiver is given for a moving target. The minimizing Geometrical
Li Wan-chun, Huang Cheng-feng
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Artificial Intelligence Approaches for GPS GDOP Classification
International Journal of Computer Applications, 2014 dilution of precision (GDOP) concept is a powerful and widespread quantify for determining the errors resulting from satellite configuration geometry. GDOP computation is based on the complicated transformation and inversion of measurement matrices that has a time and power burden. Also, basic back propagation neural network (BPNN) is easy to fall into
openaire +1 more source
Comparing Positioning Performance of LEO Mega-Constellations and GNSS in Urban Canyons
IEEE AccessThe use of Low Earth Orbit (LEO) mega-constellations for Positioning, Navigation, and Timing (PNT) services has attracted a great deal of interest, as they could complement the Global Navigation Satellite System (GNSS) in specific conditions/environments.
Harshal More +2 more
doaj +1 more source
Aerospace, 2017 In recent years, global navigation satellite system (GNSS)-based navigation in high earth orbits (HEOs) has become a field of research interest since it can increase the spacecraft’s autonomy, thereby reducing the operating costs.
Endrit Shehaj +4 more
doaj +1 more source
An Airport Surface Target Static/Motion States Test Method Applied by MLAT Surveillance System
工程科学与技术, 2016 :Under the influence of GDOP(Geometric Dilution of Precision),the localization noise of MLAT system relate directly to target's geometric position, which will degrade the performance of traditional test method. This paper proposes a test method of target
Peng Wei
doaj