Zobrazeno 1 - 10
of 150
pro vyhledávání: '"acquisition and tracking"'
Autor:
Andre C. Campos, Petia Georgieva, Marco A. Fernandes, Paulo P. Monteiro, Gil M. Fernandes, Fernando P. Guiomar
Publikováno v:
IEEE Access, Vol 12, Pp 73793-73809 (2024)
Free-Space Optical (FSO) communications have emerged as a viable solution to complement conventional communication technologies, mainly due to their high transmission rates, ease of implementation, low cost, and unlicensed spectrum. However, FSO tech
Externí odkaz:
https://doaj.org/article/7b995669f556440ba65ed61e94e49e9b
Autor:
Ayden McCann, Alex Frost, Skevos Karpathakis, Benjamin Dix-Matthews, David Gozzard, Shane Walsh, Sascha Schediwy
Publikováno v:
Photonics, Vol 11, Iss 7, p 633 (2024)
Free space optical technology promises to revolutionize point-to-point communications systems. By taking advantage of their vastly higher frequencies, coherent optical systems outperform their radio counterparts by orders of magnitude in achievable d
Externí odkaz:
https://doaj.org/article/9f01950610ec44bb9e8c9914e1506755
Publikováno v:
IEEE Access, Vol 11, Pp 18343-18355 (2023)
Among various multi-wave imaging methods, the photoacoustic imaging (PAI) has attracted more attention because it can achieve higher resolution and contrast through combining advantages of light excitation and ultrasound detection. However, due to lo
Externí odkaz:
https://doaj.org/article/c3f8eb4924824b63a5f8d04e5201f52a
Publikováno v:
天地一体化信息网络, Vol 3, Pp 39-46 (2022)
Based on the laser inter-satellite communication link to realize information transmission between diff erent satellite nodes in satellite constellation, it can solve the problems of slow data rate and limited frequency resources in traditional satell
Externí odkaz:
https://doaj.org/article/b7406906135b413496ce6740507f5f91
Akademický článek
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Publikováno v:
Tongxin xuebao, Vol 41, Pp 54-61 (2020)
A novel navigation signal design method based on spread code time shift position modulation was proposed,which inherits the idea of separating the pilot signal component and the data signal component,and applies time shift position of the spread code
Externí odkaz:
https://doaj.org/article/d0e1d69736124858abc810a981902c54
Publikováno v:
Satellite Navigation, Vol 1, Iss 1, Pp 1-9 (2020)
Abstract The BeiDou system (BDS) plays a significant role in people’s lives, but its security is easily affected by spoofing attacks. The radio determination satellite service (RDSS) is a special service of BDS that provides two-way communication,
Externí odkaz:
https://doaj.org/article/789702d89a864751b75573048d900990
Publikováno v:
IEEE Access, Vol 8, Pp 75833-75845 (2020)
Very long baseline interferometry (VLBI) is widely used for astronomical observations and navigation of deep space receivers. To solve the problems of the downlink signal being excessively weak to be received and the excessively large acquisition tim
Externí odkaz:
https://doaj.org/article/5a078e289c2848b8959c6e3e75070bd3
Autor:
Geuk-Nam Kim, Sang-Young Park, Sehyun Seong, Jae-Young Choi, Sang-Kook Han, Young-Eon Kim, Suyong Choi, Joohee Lee, Sungmoon Lee, Han-Gyeol Ryu, Seonghui Kim
Publikováno v:
Aerospace, Vol 9, Iss 8, p 423 (2022)
With growth in data volume from space missions, interest in laser communications has increased, owing to their importance for high-speed data transfer in the commercial and defense fields, spaceborne remote sensing, and surveillance. Here, we propose
Externí odkaz:
https://doaj.org/article/bddbc04687f44138afa316cb163bb5f5
Akademický článek
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