摘要： 结合均匀线阵的窄带互耦模型和宽带信号的频率分集思想，分析并推导互耦条件下的宽带数据接收模型，在该模型的基础上，提出一种基于辅助阵元的宽带接收信号预处理算法。经过预处理后，在利用基于相干信号的处理方法构造聚焦矩阵时，无需考虑互耦效应，即可在互耦系数未知的情况下，直接进行聚焦运算和宽带信号来波方位估计。仿真结果表明，该算法不仅能明显降低计算复杂度，且预处理后的角度估计精度在信噪比大于10 dB时，接近于互耦系数精确已知条件下的估计精度。

关键词: 来波方位估计, 阵列互耦, 宽带阵列模, 辅助阵元, 盲校正

Abstract: The model of wideband array output in the presence of mutual coupling is constructed through studying the model of narrowband array output and the idea of frequency diversity. Based on this model, a preprocessing algorithm of wideband signal is proposed with instrumental sensors. After this preprocessing, mutual coupling effects do not need to be considered when calculating the focusing matrices. Consequently, the focusing calculation procedure is conducted and the Direction of Arrival(DOA) is estimated directly without knowing the mutual coupling coefficients. Simulations show that this algorithm not only reduce the computational complexity, and the angle estimation accuracy using the proposed preprocessing algorithm is extremely close to the result in condition of accurately knowing the mutual coupling coefficients when the Signal to Noise Ratio(SNR) is more than 10 dB.

Key words: Direction of Arrival(DOA) estimation, array mutual coupling, wideband array model, instrumental sensor, blind calibration

中图分类号: 

• TN911.7