双边相关变换在估计水下噪声源波达方向中的应用

Application of two-sided correlation matrices transformation to estimation of direction of arrival of underwater sound source

研究双边相关变换高分辨率波束成形去估计水下噪声源波达方向的方法和性能,提出了对水下运动目标进行精确定向的一种高精度定向算法,用分割频带中的能量最大频段的窄带定向结果作为初始角,宽带中的高频分割频带作为处理对象来获得较高的定向精度。仿真数据和实际数据表明,该算法是一种花费时间少、定向精度高、简便实用的宽带定向方法。这种高精度的测向算法为水下两基阵交会测距提供了保证。

Estimating exactly DOA (Direction of Arrival) of underwater noise source confuses the assayer of passive sonar target. A high-resolution DOA algorithm is presented,which concerns the performance of TCT (Two-sided Correlation matrices Transformation) in estimating DOA (Direction of Arrival) of underwater noise source of single-target. The high-frequency group of underwater wideband noise is selected to estimate DOA. The maximum power frequency in the selected frequency group is used for the estimation of initial DOA. Computer simulation results and experimental results with real underwater acoustic data have confirmed the algorithm is high-resolution and lower computational cost. The algorithm makes sure of ranging underwater moving targets by two sonar array.