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An Adaptive Topology Optimization Strategy for GNSS Inter-satellite Network.pdf (3.36 MB)
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An Adaptive Topology Optimization Strategy for GNSS Inter-satellite Network

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posted on 19.11.2021, 14:32 authored by Kai HANKai HAN, Bingbing XU, Fengwei SHAO, Wenbin GONG, Qianyi REN
Inter satellite link (ISL) is an effective way for the global navigation satellite system (GNSS) to reduce its dependence on ground infrastructure, which guarantees constellation orbit determination and satellite communication. When the number of onboard Ka-band ISL antennas is less than that of visible satellites, the inter-satellite link assignment of GNSS causes a problem. For the problem of inter-satellite link scheduling, considering that the result of the allocated link has a feedback effect on the subsequent link assignment as a priori knowledge, an adaptive topology optimization algorithm based on signed variance (ABSV) is proposed. In order to meet the requirements of communication and ranging performance, the time slot is divided into a communication time slot and a ranging time slot. Taking the waiting delay time of satellite communication and PDOP as measurement indexes, the proposed strategy is simulated for 10080 min. The results show that the ranging performance of this strategy is better than other recently published methods, which verifies the effectiveness of signed variance for adaptive link planning and is also beneficial to the survivability of constellation.

Funding

Shanghai “Post-Qi-Ming-Xing Plan” for Young(18QA1404000)

Shanghai Scientific Research Projects (18DZ1112001)

History

Email Address of Submitting Author

hankai20@mails.ucas.ac.cn

ORCID of Submitting Author

0000-0003-0025-3617

Submitting Author's Institution

Innovation Academy for Microsatellites of Chinese Academy of Sciences

Submitting Author's Country

China