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提出了一种利用信号空间时频特征的高效波达方向(DOA)估计方法。通过计算参考阵元输出与其它阵元输出之间的互时频分布,构造出新的时频域数据矩阵模型,然后在时频面上不同的能量聚集区域内选择时频点,构造空间时频分布矩阵,然后对进行矩阵奇异值分解来实现波达方向估计。与直接构造空间时频分布矩阵的方法相比,该方法构造矩阵的计算量大大减小,并且能处理相干信号。仿真结果验证了算法的有效性。
A DOA estimation method based on time-frequency feature in signal space is proposed. By calculating the time-frequency distribution between the output of reference array element and the output of other array elements, a new time-frequency data matrix model is constructed, and then time-frequency points are selected in different energy accumulation areas on the time-frequency plane to construct space Frequency distribution matrix, and then perform matrix singular value decomposition to realize DOA estimation. Compared with the method of directly constructing the time-frequency distribution matrix in space, this method can reduce the computational complexity of constructing the matrix and can process coherent signals. Simulation results verify the effectiveness of the algorithm.