一种新的自聚焦相干宽带DOA算法

A Novel Auto-Focusing Coherent Wideband DOA Algorithm

传统的基于相干信号空间聚焦的宽带DOA算法具有良好的空间分辨能力、较低的信噪比门限,但必须通过角度预估计来构造相应的聚焦矩阵。本文提出了一种不需要角度预估的相干宽带DOA算法,直接利用阵列接收数据构造聚焦变换矩阵,避免了预估计角度对聚焦变换的影响,同时降低了算法的运算量。计算机仿真表明该算法是切实可行的。

The conventional wideband direction-of-arrival （DOA） algorithms based on coherent signal-subspace focusing features excellent spatial resolution and low signal-to-noise threshold, but construction of the corresponding focusing matrix must rely on preliminary angle estimation. A coherent wideband DOA algorithm to construct focusing conversion matrix without preliminary angle estimation is presented, which could avoid the impact of the preliminary angle estimation on focusing conversion, meanwhile computation load of the algorithm is reduced. Computer simulation results proved that the algorithm is effective and feasible.