基于辅助阵元的宽带相干信源DOA估计快速算法

摘要

For the presence of array mutual coupling errors, an algorithm based on the mutual coupling model of wideband signals is proposed with instrumental sensors and propagator. The method using instrumental sensors can focus on the wideband signals directly even if the mutual coupling matrix is unknown. The new method using the propagator does not need eigenvalue decomposition when the focusing matrix is constructed and the noise subspace is obtained, therefore, the computational complexity can be obviously reduced. Simulation results show the effectiveness and robustness of the algorithm when the array model error exists.%针对阵列互耦误差存在的情况，基于宽带信号互耦模型，提出一种基于辅助阵元和传播算子的宽带信号处理算法。该算法在互耦矩阵未知的情况下，利用辅助阵元可以直接对宽带信号进行聚焦，并且在构造聚焦矩阵和获得噪声子空间时利用传播算子不需要进行特征值分解，因而极大地降低了运算量。仿真结果表明了存在阵列模型误差时本算法的有效性和稳健性。