Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Shaojie Ni"'
Publikováno v:
天地一体化信息网络, Vol 4, Pp 61-70 (2023)
Low-orbit satellites are widely used in communication, navigation, remote sensing and other fields, which is of great significance to meet the needs of communication and improve the accuracy of navigation and positioning.Integrity technology is an im
Externí odkaz:
https://doaj.org/article/96b1d811ce1b4468bb52616fc1ac0731
Publikováno v:
Remote Sensing, Vol 15, Iss 17, p 4344 (2023)
Antenna arrays with adaptive filtering can protect the integrity and functionality of global navigation satellite system (GNSS) receivers against interference. However, a major problem with existing adaptive array processing algorithms is that they c
Externí odkaz:
https://doaj.org/article/5e6b97163d2d47e3b8ccddf6f6e6a0bb
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
The global navigation satellite system is a high-precision radio navigation system based on artificial satellites. Among the factors affecting the positioning accuracy of the navigation satellite system, the multipath signal is the most significant a
Externí odkaz:
https://doaj.org/article/d6a50ac9221d486ab1119db0f4060858
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
In order to analyze the anti-spoofing performance of the Global Navigation Satellite System (GNSS) multi-beam anti-jamming receiver in the presence of direct repeater spoofing, this paper deduces the theoretical formulas of the output real signal and
Externí odkaz:
https://doaj.org/article/3b155349a2ae4d4691bd9274090c529a
Publikováno v:
Remote Sensing, Vol 15, Iss 13, p 3387 (2023)
The adaptive beamforming algorithm can realize interference suppression and navigation signal enhancement, and has been widely used. However, achieving high-precision real-time estimation of the direction of arrival (DOA) parameters of navigation sig
Externí odkaz:
https://doaj.org/article/89ff324a0e2a4a26a1ddb8016cab748d
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
The endless spoofing interference affects the credibility of the navigation system seriously. In order to suppress the forward spoofing which is more threatening to military signals in GNSS, this paper proposes a spoofing suppression algorithm based
Externí odkaz:
https://doaj.org/article/c39d7fabab8a4e9b96c1cfec1e86d912
Publikováno v:
IEEE Access, Vol 8, Pp 112496-112506 (2020)
Model strength and biases are two main factors for GNSS integer ambiguity resolution. Due to the nonideal GNSS signal, the receiver's observations will be biased. In GNSS relative positioning, the double difference pseudorange bias cannot be eliminat
Externí odkaz:
https://doaj.org/article/104b6f2f940b485f986ebf95f5300dbe
Publikováno v:
IEEE Access, Vol 7, Pp 153041-153048 (2019)
In satellite navigation receivers, the hardware delays of code and carrier are different because of their different tracking processes, which is called as the code-carrier hardware delay difference. This difference depends on the condition of receive
Externí odkaz:
https://doaj.org/article/4503f0b4890743d2b4ba80687e563d4c
Publikováno v:
International Journal of Antennas and Propagation, Vol 2019 (2019)
High-precision global navigation satellite system (GNSS) antennas employed on the fixed ground station are usually equipped with radomes, which are potential in yielding degradation of key parameters of antenna such as axial ratio and gain. This pape
Externí odkaz:
https://doaj.org/article/7f4947cce4ad4d5899a4fd417b29ab00
Publikováno v:
Remote Sensing, Vol 11, Iss 22, p 2676 (2019)
Synthetic aperture radar (SAR) target recognition under extended operating conditions (EOCs) is a challenging problem due to the complex application environment, especially for insufficient target variations and corrupted SAR images in the training s
Externí odkaz:
https://doaj.org/article/41675883703941b49fd2ce7466245c35