A novel sampling method for reconstruction of a moving point acoustic source in
arXiv:2607.27621
The paper proposes a new sampling technique that recovers the 3‑D trajectory and emission times of a moving acoustic point source using data from only five observation points, offering improved efficiency and noise robustness.
Abstract
In this paper, we introduce a novel sampling method to recovering the trajectory of a moving point source in R^3, where both the spatial location and emission moment of the moving point source are unknown. Combining algebraic theory with geometric knowledge, we prove the uniqueness of the source location by using measured data from five observation points. Our sampling method constructs an indicator function based on the property that the residual of the time difference of arrival constraint formula vanishes at the true source location. It achieves the reconstruction of the spatial positions and emission moments of a moving point source only using data from five observation points and their corresponding arrival times. The algorithm not only reduces the required number of observation points, but also improves computational efficiency, stability, and noise resistance. Numerical experiments verify the effectiveness of the method.