Results 31 to 40 of about 114,399 (242)

A General Model for Pointing Error of High Frequency Directional Antennas

IEEE Open Journal of the Communications Society, 2022
This paper focuses on providing an analytical framework for the quantification and evaluation of the pointing error for a general case at high-frequency millimeter wave (mmWave) and terahertz (THz) communication links.
Mohammad Taghi Dabiri, Mazen Hasna, Nizar Zorba, Tamer Khattab, Khalid A. Qaraqe   +4 more
doaj   +1 more source

A Correction Method of Estimating the Pointing Error for Reflector Antenna

Shock and Vibration, 2018
The pointing error caused by the structural deformation of large reflector antennas has become the most challenging problem of antenna servo control. Especially with the increase of the antenna diameter and the working frequency, environmental loads not ...
Jie Zhang, Jin Huang, Wei Liang, Youran Zhang, Qian Xu, Letian Yi, Congsi Wang   +6 more
doaj   +1 more source

Error Analysis and Compensation of Roll-Pitch Semi-Strapdown Photo-Electricity Stabilized Platform [PDF]

Hangkong bingqi, 2021
In order to improve the pointing accuracy of roll-pitch semi-strapdown photo-electricity stabilized platform, a method for error modeling and parameter calibration of stabilized platform is proposed.
Zhao Yixin, Cui Hao, Chen Xiaozeng, Ding Haishan
doaj   +1 more source

Analysis of Coaxiality Error Induced by the Cube Corner Retro-Reflector Geometrical and Assembly Errors of an Acquisition, Pointing, and Tracking System

Photonics, 2023
Satellite laser communication is a promising technology for the next-generation communication system. Its communication performance is subject to the APT beam-pointing accuracy.
Daquan Li, Zhaoyong Mao, Lijuan Sun, Haifeng Zhang, Furui Zhang   +4 more
doaj   +1 more source

Intelligent Motion Compensation for Improving the Tracking Performance of Shipborne Phased Array Radar

International Journal of Antennas and Propagation, 2013
The shipborne phased array radar must be able to compensate the ship’s motion and track the maneuvering targets automatically. In this paper, the real-time beam pointing error compensation mechanism of a planar array antenna for ship’s motion is ...
J. Mar, K. C. Tsai, Y. T. Wang, M. B. Basnet   +3 more
doaj   +1 more source

On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments

Journal of Information and Telecommunication, 2020
In this work, we analyse pointing error effects on the performance of amplify-and-forward (AF) relaying multiple-input multiple-output (MIMO) free-space optical (FSO) communication system employing sub-carrier quadrature amplitude modulation (SC-QAM ...
Duong Huu Ai, Ha Duyen Trung, Do Trong Tuan   +2 more
doaj   +1 more source

Error in Key Points

JAMA Network Open
  +19 more sources

Periodic template compensation phase feeding method for phased array antenna

IET Microwaves, Antennas & Propagation, 2023
To minimise the beam‐pointing error caused by the digital phase shifter in phased array antenna systems, a periodic template compensation (PTC) phase feeding algorithm is proposed in this study.
Renli Zhang, Nuo Chen, Shuang Qiu, Weixing Sheng   +3 more
doaj   +1 more source

Performance Evaluation of MPPM-Coded Wireless Optical MIMO System with Combined Effects over Correlated Fading Channel

International Journal of Antennas and Propagation, 2020
The performance of wireless optical MIMO system with multiple pulse position modulation (MPPM) over correlated fading channel is investigated. The combined effects of atmospheric attenuation, atmospheric turbulence, and pointing error are taken into ...
Yue Zhang, Huiqin Wang, Minghua Cao, Zhongxian Bao   +3 more
doaj   +1 more source

Spatial Power Combining of DSSS Signals From a Sparse Array

IEEE Access, 2019
This paper generalizes the technique of spatial power combining to modulated signals and applies it to effectively strengthen or deny communications and navigation services in desired area.
Xiaofeng Ouyang, Fangling Zeng, Daqian Lv, Wenhao Wang   +3 more
doaj   +1 more source