Principle and performance of BDSBAS and PPP-B2b of BDS-3

Yang, Yuanxi; Ding, Qun; Gao, Weiwei; Li, Jinlong; Xu, Ya; Sun, Bo

doi:10.1186/s43020-022-00066-2

Cited by 84 publications

(31 citation statements)

References 27 publications

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“…Therefore, the contributions in this work could be extended by applying the minimum loss strategy with a globally optimal solution. It might also be extended by applying the MLD method to similar systems, such as the WAAS and EGNOS [6]. Finally, a recent report has suggested that inclined geosynchronous orbit (IGSO) and low earth orbit satellites might be added to the BDSBAS to improve service performance [6], which would introduce new Doppler rates to the BDSBAS signals, thus making our method unsuitable for such a highly dynamic environment without an auxiliary method to calculate the relevant rates.…”

Section: Resultsmentioning

confidence: 99%

“…It might also be extended by applying the MLD method to similar systems, such as the WAAS and EGNOS [6]. Finally, a recent report has suggested that inclined geosynchronous orbit (IGSO) and low earth orbit satellites might be added to the BDSBAS to improve service performance [6], which would introduce new Doppler rates to the BDSBAS signals, thus making our method unsuitable for such a highly dynamic environment without an auxiliary method to calculate the relevant rates. Conveniently, the current BDSBAS signals transmitted by GEO satellites [4], allow the Doppler rates to be neglected.…”

Section: Resultsmentioning

confidence: 99%

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Fast GPU based acquisition with minimum loss and downsampling techniques for weak BeiDou SBAS signals

Tang

Chen

et al. 2023

IET Radar Sonar & Navi

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For a receiver of the BeiDou Satellite Based Augmentation System (BDSBAS), the acquisition aims to coarsely estimate the pseudo-code delays and carrier Doppler shifts of the received signals. The use of downsampling techniques to accelerate this acquisition process for weak signals has been an emerging topic. However, the acquisition probabilities of conventional algorithms with downsampling are inadequate and need to be enhanced to prevent excessive false alarms due to degradation of the peak signal-to-noise ratios (PSNRs) during acquisition. To improve signal acquisition performance, we introduce an enhancer function before downsampling to achieve the minimum PSNR loss during acquisition. Then, we use graphic processing unit (GPU) functions to speed up the processing loop, matrix multiplication and fast Fourier transform operations. We thus present a fast GPUbased acquisition method by using minimum loss and downsampling techniques. Our experimental results show the remarkable effectiveness of our method for receiving weak BDSBAS signals as compared to legacy downsampling algorithms. This work seeks not only to solve the current issue of achieving fast acquisition of weak BDSBAS signals but also to inspire creative new ideas that spur further advances in this promising field in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fast GPU based acquisition with minimum loss and downsampling techniques for weak BeiDou SBAS signals

Tang

Chen

et al. 2023

IET Radar Sonar & Navi

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“…The Beidou Navigation Satellite System (BDS) has completed the "three step" strategy (Yang et al 2022). Now, BDS can provide real-time, all-weather, high accuracy services for global users (Braasch 1996; Xu et al 2022).…”

Section: Introductionmentioning

confidence: 99%

BDS dual-frequency carrier phase multipath MHM model and its application in real deformation monitoring scenario

Zhang

Sun

Gào

et al. 2023

Preprint

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The BDS multipath delay error is highly related to the surrounding monitoring environment, which cannot be eliminated or mitigated by establishing the double difference observation model. In the actual monitoring environment, due to the complexity of the BDS constellation, it is difficult for existing algorithms to consider GEO, IGSO, MEO and other different orbital types of satellites for real-time and efficient multipath error reduction. Therefore, this paper proposes a novel BDS dual-frequency multipath error reduction method for real deformation monitoring for BDS considering various satellite orbit types. This method extracts the single error residual of each satellite based on the assumption of "zero mean", and divides the appropriate grid density of GEO and IGSO\MEO respectively, to construct the dual-frequency multi-path hemispherical map model suitable for BDS satellites with different orbital types. This method can realize the multi-path error elimination of the observed values of different orbits and different frequencies. The results of simulation experiments and real deformation monitoring data demonstrate that this method can effectively eliminate low-frequency multipath delay errors in the observation domain and coordinate domain. After multipath correction, the precision of the horizontal coordinates and height coordinates is 1.7mm and 4.6mm. The precision of the horizontal coordinate and height coordinate is increased by 50% and 60% respectively. The fixed rate of ambiguity increased by 5%~7%.

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“…The global navigation satellite system (GNSS) is widely utilized for positioning since it is capable of providing a continuous and global-covered position, velocity and time (PVT). Particularly, with the construction and development of existing GNSS, such as the U.S. global positioning system (GPS), the Russian GLONASS, the Chinese BeiDou navigation system (BDS) and the European Galileo, the performance of GNSS has been further enhanced in recent years [3][4][5][6]. However, the accuracy of the existing GNSS can hardly satisfy the demand of some LBSs, such as the autonomous and unmanned vehicles in complex environments in the big cities with high buildings.…”

Section: Introductionmentioning

confidence: 99%

“…Since both the transmitted signal st ji and the received signal sr ij are obtained, we can calculate the flat fading coefficient, which can be further used to estimate the distance between the two nodes based on (6) or (9). Nevertheless, it has to be pointed out that the estimated distance is not an accurate one because of various noises.…”

mentioning

confidence: 99%

A GNSS/5G Integrated Three-Dimensional Positioning Scheme Based on D2D Communication

et al. 2022

Self Cite

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The fifth generation (5G) communication has the potential to achieve ubiquitous positioning when integrated with a global navigation satellite system (GNSS). The device-to-device (D2D) communication, serving as a key technology in the 5G network, provides the possibility of cooperative positioning with high-density property. The mobile users (MUs) collaborate to jointly share the position and measurement information, which can make use of more references for positioning. In this paper, a GNSS/5G integrated three-dimensional positioning scheme based on D2D communication is proposed, where the time of arrival (TOA) and received signal strength (RSS) measurements are jointly utilized in the 5G network. The density spatial clustering of application with noise (DBSCAN) is exploited to reduce the position uncertainty of the cooperative nodes, and the positions of the requesting nodes are obtained simultaneously. The particle filter (PF) algorithm is further conducted to improve the position accuracy of the requesting nodes. Numerical results show that the position deviation of the cooperative nodes can be significantly decreased and that the proposed algorithm performs better than the nonintegrated one. The DBSCAN brings an increase of about 50% in terms of the positioning accuracy compared with GNSS results, and the PF further increases the accuracy about 8%. It is also verified that the algorithm suits the fixed and dynamic condition well.

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Principle and performance of BDSBAS and PPP-B2b of BDS-3

Cited by 84 publications

References 27 publications

Fast GPU based acquisition with minimum loss and downsampling techniques for weak BeiDou SBAS signals

Fast GPU based acquisition with minimum loss and downsampling techniques for weak BeiDou SBAS signals

BDS dual-frequency carrier phase multipath MHM model and its application in real deformation monitoring scenario

A GNSS/5G Integrated Three-Dimensional Positioning Scheme Based on D2D Communication

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