Results 11 to 20 of about 75,082 (248)
Requirements and Solutions for Robust Beam Alignment in Fiber-Coupled Free-Space Optical Systems
Photonics, 2023 The continuous growth of Internet data traffic is pushing the current radio-frequency wireless technologies up to their physical limits. To overcome the upcoming bandwidth bottleneck, Free-Space Optics (FSO) is currently deemed as a key breakthrough ...
Manuel M. Freitas +4 more
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EFFECT OF ANTENNA POINTING ERRORS ON SAR IMAGING CONSIDERING THE CHANGE OF THE POINT TARGET LOCATION [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Towards spaceborne spotlight SAR, the antenna is regulated by the SAR system with specific regularity, so the shaking of the internal mechanism is inevitable. Moreover, external environment also has an effect on the stability of SAR platform.
X. Zhang +4 more
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Performance of UAV-to-Ground FSO Communications with APD and Pointing Errors
Applied System Innovation, 2021 Recently, a combination of unmanned aerial vehicles (UAVs) and free-space optics (FSO) has been investigated as a potential method for high data-rate front-haul communication links.
Ha Duyen Trung
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Measuring Antenna Elevation Mechanism Pointing Errors with Multiencoder Information Sources
Advances in Astronomy, 2023 There are many factors that cause pointing errors in radio telescopes. As one of the motion positioning mechanisms of the radio telescope, the error caused by the elevation mechanism cannot be ignored. The source of error in the elevation mechanism comes
Duoxiang Xu, Qian Xu, Na Wang, Fei Xue
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Terahertz Communications Between Unstable Transceivers With Pointing Errors Over FTR Fading
IEEE Open Journal of the Communications Society, 2023 Terahertz (THz) wireless communication has emerged as a promising technology for high-speed, ultra-broadband, and low-latency data transmission. However, the performance of THz systems is significantly affected by various channel and system parameters ...
Anil Yadav, Ranjan K. Mallik
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New Results for the Pointing Errors Model in Two Asymptotic Cases
IEEE Photonics Journal, 2023 Several precise and computationally efficient results for pointing errors models in two asymptotic cases are derived in this paper. The normalized mean-squared error (NMSE) performance metric is employed to quantify the accuracy of different models.
Maoke Miao +3 more
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Pointing error compensation of electro-optical detection systems using Gaussian process regression
International Journal of Metrology and Quality Engineering, 2021 Pointing accuracy is an important indicator for electro-optical detection systems, as it significantly affects the system performance. However, as a result of misalignment, nonperpendicularity in the manufacturing and assembly processes, as well as the ...
Tang Qijian +3 more
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Inverse Solution Error Analysis and Correction of Beam Steering System Based on Risley Prisms
Applied Sciences, 2022 The pointing accuracy of the Risley prisms beam-steering system mainly depends on the accuracy of the solution method and the impact of the error on the solution.
Yinuo Song +4 more
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IEEE Photonics JournalVehicular quantum communication terminals (VQCTs) are crucial for establishing global-scale quantum networks. High-precision line-of-sight (LOS) pointing is essential for fast and reliable acquisition in satellite-based quantum key distribution (QKD ...
Zihao Wang +8 more
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