wo-dimensional off-grid DOA estimation method under wide transmit beam conditions

Low Probability of Interception (LPI) Radar can form wide spatial beams by transmitting partially correlated or even orthogonal signals, thereby dispersing the transmitted signal energy across the airspace and improving the radar system's survivability. To address the problems of reduced signal-to-noise ratio (SNR) and increased source coherence associated with wide transmit beams for Direction of Arrival (DOA) estimation, , based on atomic norm correlation theory, this paper transforms the two-dimensional DOA estimation problem into two one-dimensional DOA estimation problems by equivalently transforming the array receive data model. This method achieves high-precision two-dimensional off-grid DOA estimation with minimal computational effort. The proposed method effectively addresses the challenges of wide transmit beams for DOA estimation and helps balance RF stealth and target parameter estimation performance.