Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Lvyang Ye"'
Publikováno v:
Drones, Vol 8, Iss 5, p 207 (2024)
In response to potential denial environments such as canyons, gullies, islands, and cities where users are located, traditional Telemetry, Tracking, and Command (TT&C) systems can still maintain core requirements such as availability, reliability, an
Externí odkaz:
https://doaj.org/article/fc0d81ddd6ca4cb7a324b7f301f33820
Publikováno v:
Aerospace, Vol 10, Iss 5, p 411 (2023)
Challenging environments such as cities, canyons, and forests have become key factors affecting navigation stability. When users pass through intricate overpasses and winding road sections, due to the fluctuation of the geoid, there will be a large f
Externí odkaz:
https://doaj.org/article/a1c07d2d13804684b5b8d29b54da7245
Publikováno v:
Drones, Vol 6, Iss 9, p 241 (2022)
To solve the problem of location services in harsh environments, we propose an integrated navigation algorithm based on broadband low-earth-orbit (LEO) satellite communication and navigation integration with 3-satellite alternate switch ranging. Firs
Externí odkaz:
https://doaj.org/article/6974965287204e68adcb46b37fc68a28
Publikováno v:
Applied Sciences, Vol 12, Iss 19, p 9486 (2022)
This paper proposes a new navigation modulation based on orthogonal frequency division multiplexing (OFDM). We derived the autocorrelation function and power spectral density of the OFDM modulation. The influence of the cyclic prefix and zero-padding
Externí odkaz:
https://doaj.org/article/6c64d31d8e4a4f2494d4025d3b543546
Publikováno v:
Remote Sensing, Vol 14, Iss 16, p 3871 (2022)
Frequency-hopping binary offset carrier modulation improves the anti-interference performance and mitigates the autocorrelation function (ACF) ambiguity problem of binary offset carrier modulation. To save payload resources and make high-power amplif
Externí odkaz:
https://doaj.org/article/6f61908b2e2e4bf2bb7a1508d1f87c05
Publikováno v:
Mathematics, Vol 10, Iss 10, p 1627 (2022)
In view of the problem that the leader-follower joint navigation scheme relies too much on the absolute navigation and positioning accuracy of the leader node, under the conditions of distributed network-centric warfare (NCW) and to meet the location
Externí odkaz:
https://doaj.org/article/bb01fabfb5744c039cf2702936fe0cde
Publikováno v:
Sensors, Vol 22, Iss 9, p 3213 (2022)
In order to solve the collaborative navigation problems in challenging environments such as insufficient visible satellites, obstacle reflections and multipath errors, and in order to improve the accuracy, usability, and stability of collaborative na
Externí odkaz:
https://doaj.org/article/39888e09d1c74b039dab93b02e3f12ae
Publikováno v:
Remote Sensing, Vol 13, Iss 20, p 4099 (2021)
To solve the problem of location service interruption that is easily caused by incomplete visual satellite environments such as occlusion, urban blocks and mountains, we propose an altimeter + inertial navigation system (INS) + giant low earth orbit
Externí odkaz:
https://doaj.org/article/8904fda9c24148548955ebe4344e957d
Publikováno v:
Remote Sensing, Vol 13, Iss 16, p 3312 (2021)
In challenging environments such as forests, valleys and higher latitude areas, there are usually fewer than four visible satellites. For cases with only two visible satellites, we propose a dual-satellite alternate switching ranging integrated navig
Externí odkaz:
https://doaj.org/article/a1f89a10b57744a89e062f2b768d7d5d
Publikováno v:
Remote Sensing, Vol 13, Iss 4, p 703 (2021)
With the rapid development of satellite technology and the need to satisfy the increasing demand for location-based services, in challenging environments such as indoors, forests, and canyons, there is an urgent need to improve the position accuracy
Externí odkaz:
https://doaj.org/article/e9e01d4ed932462fad7897fd2dd0515f