Improving line-of-sight pointing accuracy of laser communication system based on Kalman filter

Ruoxi Wu; Xin Zhao; Chengjun Tian; Yunqing Liu; Yansong Song

doi:10.1117/1.OE.58.1.016110

23 January 2019 Improving line-of-sight pointing accuracy of laser communication system based on Kalman filter

Ruoxi Wu, Xin Zhao, Chengjun Tian, Yunqing Liu, Yansong Song

Author Affiliations +

Optical Engineering, Vol. 58, Issue 1, 016110 (January 2019). https://doi.org/10.1117/1.OE.58.1.016110

Abstract

The size of the field of uncertainty (FOU) is an important performance indicator of spatial optical communication systems and is closely related to the line-of-sight (LOS) pointing accuracy. Considering the aircraft-ground laser communication as the research background, the initial pointing angle of the LOS of communication is obtained using the coordinate transformation matrix, and the factors that affect the LOS pointing accuracy error are analyzed. The Kalman filtering technique is introduced into the LOS pointing system to complete system modeling and simulation analysis. The simulation results show that the position, attitude angle, and other data fluctuations of global positioning system/inertial navigation system composite systems can be smoothed effectively by adding a Kalman filter to the LOS pointing system, and the prediction function of the filter can reduce the influence of dynamic lag. The proposed approach improves the accuracy of the LOS pointing, reduces the size of the FOU, and provides reference and guidance for the design of space optical communication systems.

Citation Download Citation

Ruoxi Wu, Xin Zhao, Chengjun Tian, Yunqing Liu, and Yansong Song "Improving line-of-sight pointing accuracy of laser communication system based on Kalman filter," Optical Engineering 58(1), 016110 (23 January 2019). https://doi.org/10.1117/1.OE.58.1.016110

Received: 9 November 2018; Accepted: 26 December 2018; Published: 23 January 2019

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