Multi-target Direction-of-Arrival Estimation Method Based on Graph Signal Processing

Direction of Arrival Estimation (DoA) is one of the important research directions in array signal processing. Recently, DoA based on graph signal processing provides new ideas and methods for the direction of arrival estimation application. In this paper, by improving the structure of the non-fully connected graph, a multi-target DoA method based on the graph signal of a fully connected graph is proposed. By constructing a fully connected graph related to the phase information of the linear array radar elements and performing the Fourier transform of the graph. Then use the full phase difference information between the array elements to improve the DoA estimation results, which can realize the array multi-target azimuth DoA. The simulation results show that the proposed method is more accurate than the traditional classical DoA estimation method, and it is more suitable for parallel computing.