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针对传统RSS(Rotate Signal Sub-space)算法的计算复杂度高,分辨力低等缺点,文中提出了一种基于宽带相干信号波达方向估计的改进RSS算法。该方法首先对接收数据进行共轭重构,再利用相干信号子空间法将带宽内各个频率点的信号子空间聚焦到参考频点下的同一信号子空间,然后利用均匀线阵建立数学模型,进行波达方向的估计。仿真实验结果验证了方法的有效性。
Aimed at the disadvantage of high computational complexity and low resolving power of traditional RSS (Rotate Signal Sub-space) algorithm, an improved RSS algorithm based on DOA estimation of wideband coherent signals is proposed in this paper. The method first reconstructs the received data, and then uses the coherent signal subspace method to focus the signal subspace at each frequency point in the bandwidth to the same signal subspace under the reference frequency. Then, a mathematical model is established by using a uniform linear array. The direction of arrival is estimated. Simulation results verify the effectiveness of the method.