Results 11 to 20 of about 2,132 (298)

LEO Small-Satellite Constellations for 5G and Beyond-5G Communications

IEEE Access, 2020
The next frontier towards truly ubiquitous connectivity is the use of Low Earth Orbit (LEO) small-satellite constellations to support 5G and Beyond-5G (B5G) networks. Besides enhanced mobile broadband (eMBB) and massive machine-type communications (mMTC),
Israel Leyva-Mayorga, Beatriz Soret, Maik Roper, Dirk Wubben, Bho Matthiesen, Armin Dekorsy, Petar Popovski   +6 more
doaj   +3 more sources

Modelica-Based Modeling on LEO Satellite Constellation

Linköping Electronic Conference Proceedings, 2021
The new generation of LEO (Low Earth Orbit) communication satellite constellations have the advantages of low latency, strong signals, and global coverage. In order to achieve global coverage, the LEO satellite constellations are often very large, with a large number of satellites, which puts forward high requirements for the overall design, operation ...
null Liu Chan, null Chen Liping, null Qu Yan, null Zhou Fanli, null Qian Yikai   +4 more
openaire   +3 more sources

Optimal Walker Constellation Design of LEO-Based Global Navigation and Augmentation System [PDF]

Remote Sensing, 2020
Low Earth orbit (LEO) satellites located at altitudes of 500 km~1500 km can carry much stronger signals and move faster than medium Earth orbit (MEO) satellites at about a 20,000 km altitude.
Meiqian Guan, Tianhe Xu, Fan Gao, Wenfeng Nie, Honglei Yang   +4 more
doaj   +2 more sources

Cost-Efficient LEO Navigation Augmentation Constellation Design under a Constrained Deployment Approach [PDF]

International Journal of Aerospace Engineering, 2021
The advantages of the Low Earth Orbit (LEO) satellite include low-latency communications, shorter positioning time, higher positioning accuracy, and lower launching, building, and maintenance costs.
Jing Ren, Dan Sun, Deng Pan, Mingtao Li, Jianhua Zheng   +4 more
doaj   +2 more sources

Improved PPP Ambiguity Resolution with the Assistance of Multiple LEO Constellations and Signals

Remote Sensing, 2019
The fusion of low earth orbit (LEO) constellation and Global Navigation Satellite Systems (GNSS) can increase the number of visible satellites and optimize spatial geometry, which is expected to improve the performance of precise point positioning (PPP ...
Xin Li, Xingxing Li, Fujian Ma, Yongqiang Yuan, Keke Zhang, Feng Zhou, Xiaohong Zhang   +6 more
doaj   +3 more sources

GNSS RTK Positioning Augmented with Large LEO Constellation [PDF]

Remote Sensing, 2019
It is widely known that in real-time kinematic (RTK) solution, the convergence and ambiguity-fixed speeds are critical requirements to achieve centimeter-level positioning, especially in medium-to-long baselines.
Xingxing Li, Hongbo Lv, Fujian Ma, Xin Li, Jinghui Liu, Zihao Jiang   +5 more
doaj   +2 more sources

LEO Mega-Constellations for 6G Global Coverage: Challenges and Opportunities

IEEE Access, 2021
Mega-constellations have the potential for providing 6G Internet owing to the unique advantage of global coverage. However, current satellite technologies are not omnipotent.
Haoran Xie, Yafeng Zhan, Guanming Zeng, Xiaohan Pan   +3 more
doaj   +3 more sources

Signal Structure Analysis and Thought of OneWeb LEO Constellation

天地一体化信息网络
As a supplement to terrestrial mobile communication networks, low earth orbit (LEO) satellite Internet has become an important development direction in the global aerospace and communications fields. Foreign LEO constellations represented by Starlink and
CHAI Lingyun, ZHANG Cheng, GONG Silong, BAI Tong, WANG Cheng, CUI Gaofeng   +5 more
doaj   +1 more source

Precise orbit determination for LEO satellites: single-receiver ambiguity resolution using GREAT products

Geo-spatial Information Science, 2022
In recent years, the large Low Earth Orbit (LEO) constellations have become a hot topic due to their great potential to improve the Global Navigation Satellite Systems (GNSS) positioning performance.
Xingxing Li, Yujie Qin, Keke Zhang, Jiaqi Wu, Wei Zhang, Qian Zhang, Hongmin Zhang   +6 more
doaj   +1 more source

Low-Orbit Large-Scale Communication Satellite Constellation Configuration Performance Assessment

International Journal of Aerospace Engineering, 2022
A constellation configuration performance evaluation method is proposed for the performance evaluation of the low-orbit large-scale communication satellite constellations.
Tianyu Sun, Min Hu, Chaoming Yun
doaj   +1 more source