Results 31 to 40 of about 68,626 (291)

Efficient and Robust Feature Matching for High-Resolution Satellite Stereos

Remote Sensing, 2022
Feature matching between high-resolution satellite stereos plays an important role in satellite image orientation. However, images of changed regions, weak-textured regions and occluded regions may generate low-quality matches or even mismatches ...
Danchao Gong, Xu Huang, Jidan Zhang, Yongxiang Yao, Yilong Han   +4 more
doaj   +1 more source

Assessing performance of Bayesian state-space models fit to Argos Satellite telemetry locations processed with Kalman Filtering [PDF]

, 2014
Argos recently implemented a new algorithm to calculate locations of satellite-tracked animals that uses a Kalman filter (KF). The KF algorithm is reported to increase the number and accuracy of estimated positions over the traditional Least Squares (LS)
Silva, Monica A., Ian Jonsen, Thompson Dave, Prieto Rui, Mónica A Silva, Ian Jonsen (468324), Jonsen, Ian, Deborah J F Russell, Silva Mónica A., Rui Prieto (468323), Thompson, David, Prieto, Rui, Russell, Deborah Jill Fraser, Rui Prieto, Thompson, Dave, Jonsen Ian, Mark F Baumgartner, Deborah J. F. Russell (540355), Russell Deborah J. F., Dave Thompson, Russell, Deborah J. F., Dave Thompson (292267), Mark F. Baumgartner (468325), Baumgartner Mark F., Baumgartner, Mark F., Mónica A. Silva (468322)   +25 more
core   +1 more source

Satellite Selection in the Context of Network RTK for Limited Bandwidth Applications

, 2021
The increasing number of modernized GNSS signals and the availability of multi-constellation receivers are crucial for improvements of both precision and robustness of GNSS based positioning.
Gerbeth, D.,, Håkansson, M.,, Samieh Alissa, Håkansson, Martin,, Alissa, S.,, Uttama Dutta, Nord, Stefan,, Alissa, Samieh,, Carsten Rieck, Martin Håkansson, Dutta, Uttama,, Stefan Nord, Gerbeth, Daniel,, Daniel Gerbeth, Rieck, Carsten,   +14 more
core   +1 more source

Precoding design and user selection for multibeam satellite channels [PDF]

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2015
Precoding for the downlink of a multibeam satellite system has been recently shown, under ideal conditions, to be promising technique towards employing aggressive frequency reuse gainfully. However, time varying phase uncertainties imposed by the components and the channel, combined with delayed feedback perturbs the channel state information at the ...
Ahmad Gharanjik, M. R. Bhavani Shankar, Pantelis-Daniel M. Arapoglou, Mats Bengtsson, Björn E. Ottersten   +4 more
openaire   +1 more source

Adaptive Beam Pattern Selection and Resource Allocation for NOMA-Based LEO Satellite Systems [PDF]

, 2022
The low earth orbit (LEO) satellite system is one of the promising solutions to provide broadband services to a wide-coverage area for future integrated LEO-6G networks, where users' demands vary with time and geographical locations.
WANG, Anyue, Perez-Neira, Ana I., CHATZINOTAS, Symeon, Lei, Lei, LAGUNAS, Eva, Pérez Neira, Ana Isabel, Lagunas Targarona, Eva, Hu, Xin   +7 more
core   +1 more source

A Fast Satellite Selection Algorithm Based on Hierarchical Clustering and Iterative Subset Optimization

Remote Sensing
When calculating positions, finding the optimal satellite subset is often a compromise between real-time performance and accuracy. This paper proposes a satellite selection method based on hierarchical clustering and iterative optimization.
Dan Jing, Weidie Li, Liang Han, Xinchen Li, Liangchao Li, Yan Zhang, Liang Guo, Mengdao Xing   +7 more
doaj   +1 more source

Novel virtual satellite formation scheme for deterministic transmission

Tongxin xuebao, 2023
Although satellite formation flying could effectively support deterministic transmission due to its stable formation, but its formation control required significant real-time computational overhead and did not support flexible deployment for multi ...
Chuan XU, Mi ZHOU, Guofeng ZHAO, Zhaojing CUI, Xiongwen HE   +4 more
doaj   +2 more sources

An Evaluation of Optimization Algorithms for the Optimal Selection of GNSS Satellite Subsets

Remote Sensing
Continuous advancements in GNSS systems have led, apart from the broadly used GPS, to the development of other satellite systems (Galileo, BeiDou, GLONASS), which have significantly increased the number of available satellites for GNSS positioning ...
Abdulaziz Alluhaybi, Panos Psimoulis, Rasa Remenyte-Prescott   +2 more
doaj   +1 more source

A navigation satellite selection algorithm for optimized positioning based on Gibbs sampler

International Journal of Distributed Sensor Networks, 2020
In various applications of satellite navigation and positioning, it is a key topic to select suitable satellites for positioning solutions to reduce the computational burden of the receiver in satellite selection system.
Na Xia, Qinan Zhi, Menghua He, Yunqing Hong, Huazheng Du   +4 more
doaj   +1 more source

Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage [PDF]

, 2011
Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam,
Larue de Tournemine, Cécile, J. Montesinos, O. Besson, Besson, Olivier, C. Larue de Tournemine, Montesinos, Julien   +5 more
core   +1 more source