Dr. Ke Sun Profile

Dr. Ke Sun

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Proceedings Article | 7 November 2016 Paper

Research on calibration error of carrier phase against antenna arraying

Ke Sun, Xiaomin Hou

Proceedings Volume 10141, 101410A (2016) https://doi.org/10.1117/12.2256291

KEYWORDS: Calibration, Antennas, Phase measurement, Space operations, Atmospheric turbulence, Atmospheric modeling, Turbulence, S band, X band, Signal attenuation

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It is the technical difficulty of uplink antenna arraying that signals from various quarters can not be automatically aligned at the target in deep space. The size of the far-field power combining gain is directly determined by the accuracy of carrier phase calibration. It is necessary to analyze the entire arraying system in order to improve the accuracy of the phase calibration. This paper analyzes the factors affecting the calibration error of carrier phase of uplink antenna arraying system including the error of phase measurement and equipment, the error of the uplink channel phase shift, the position error of ground antenna, calibration receiver and target spacecraft, the error of the atmospheric turbulence disturbance. Discuss the spatial and temporal autocorrelation model of atmospheric disturbances. Each antenna of the uplink antenna arraying is no common reference signal for continuous calibration. So it must be a system of the periodic calibration. Calibration is refered to communication of one or more spacecrafts in a certain period. Because the deep space targets are not automatically aligned to multiplexing received signal. Therefore the aligned signal should be done in advance on the ground. Data is shown that the error can be controlled within the range of demand by the use of existing technology to meet the accuracy of carrier phase calibration. The total error can be controlled within a reasonable range.

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