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\begin{document}

\title{Direct Position Determination of Moving Targets Based on DOA}



\author[1]{Shuming He}%
\author[1]{Yuan Jiang}%
\author[1]{Lei Zhao}%
\author[2]{Guorui Lin}%
\author[3]{Bo Peng}%
\affil[1]{Sun Yat-Sen University}%
\affil[2]{Sun Yan-sen University of Medical Sciences}%
\affil[3]{Jinan University}%


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  \date{May 27, 2024}


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\begin{abstract}
In this letter, we focus on the problem of direct position determination
(DPD) for moving targets. Compared with the traditional two-step
localization methods, the DPD methods is more robust at low
signal-to-noise ratio (SNR). However, to guarantee the optimal location
results the computational complexity of DPD with grid search is too
high, especially for moving targets. Therefore, we propose a new DPD
method for moving targets with low computational complexity. First,
using a proposed cost function, we obtain the position information from
the received array signals directly. Second, we use the method of
successional difference which averages the difference result of position
over time to extract the velocity. It avoids the multi-dimensional
parameters grid search and reduces the the computational complexity
greatly. Simulation results demonstrate that the proposed algorithm
outperforms other methods in a wide range of scenarios, especially at
low SNR.%
\end{abstract}%



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