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针对冲击噪声环境中信号源的高分辨二维波达方向(DOA)估计问题,提出了一种基于联合对角化分数低阶空时(ST)相关矩阵的二维DOA估计方法.与原ST-DOA矩阵法相比,其在保持原ST-DOA矩阵法无需二维谱峰搜索和参数配对的优点的基础上,在低信噪比下对强冲击噪声具有更好的抑制作用,同时还较好地解决了原ST-DOA矩阵法在某些曲面上存在的角度兼并问题.仿真结果证明了新方法的有效性.
Aiming at the problem of high resolution two-dimensional DOA estimation of signal source in impact noise environment, a two-dimensional DOA estimation method based on joint diagonalization fractional low-order space-time (ST) correlation matrix is proposed. Compared with the DOA matrix method, it has a better effect on strong impact noise at low signal-to-noise ratio while maintaining the advantages of the original ST-DOA matrix method without two-dimensional peak search and parameter matching. The problem of angle mergence on some surfaces of the original ST-DOA matrix method is well solved, and the simulation results prove the effectiveness of the new method.