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arXiv 2603.03556cs.ROcs.LGcs.SYeess.SY

基于因子图优化的实时紧密耦合GNSS与IMU融合

Real-time tightly coupled GNSS and IMU integration via Factor Graph Optimization

  • University Politehnica of Bucharest(巴特亚大学)
  • Three Tensors S.R.L.(Three Tensors公司)
  • University of Bucharest(布加勒斯特大学)
  • Navigation Systems Definition Section (TEC-SEN), ESA(欧洲航天局导航系统定义部门)
  • Romanian InSpace Engineering S.R.L. (RISE)(罗马尼亚InSpace工程公司)

机构由 AI 辅助整理,请以论文原文为准。

Radu-Andrei Cioaca, Paul Irofti, Cristian Rusu, Gianluca Caparra, Andrei-Alexandru Marinache, Florin Stoican

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AI总结:

本文提出基于因子图优化的实时紧密耦合GNSS与IMU融合方法,通过增量优化与固定滞后边缘化实现因果状态估计,适用于密集城区GNSS退化环境。

AI中文摘要:

密集城区环境中可靠定位仍具挑战性,由于GNSS信号频繁阻塞、多径效应和快速变化的卫星几何构型。虽然基于因子图优化(FGO)的GNSS-IMU融合已展现出强大的鲁棒性和准确性,但大多数方法仍为离线处理。本文提出了一种实时紧密耦合GNSS-IMU FGO方法,通过增量优化与固定滞后边缘化实现因果状态估计,并利用UrbanNav数据集在高度城市化GNSS退化环境中评估其性能。

英文摘要:

Reliable positioning in dense urban environments remains challenging due to frequent GNSS signal blockage, multipath, and rapidly varying satellite geometry. While factor graph optimization (FGO)-based GNSS-IMU fusion has demonstrated strong robustness and accuracy, most formulations remain offline. In this work, we present a real-time tightly coupled GNSS-IMU FGO method that enables causal state estimation via incremental optimization with fixed-lag marginalization, and we evaluate its performance in a highly urbanized GNSS-degraded environment using the UrbanNav dataset.

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