基于垂直矢量阵的相干信号方位估计算法

Direction-of-Arrival Estimation Algorithm for Coherent Sources Based on a Vertical Vector Sensor Array

为了实现相干信号源的空间方位估计,将计算到达角瞬态成像(CAATI)算法引入矢量线阵,提出了基于垂直矢量阵的CAATI算法。该方法不仅具有CAATI算法所需快拍数少、运算量小、精确度高的特点,并且兼具矢量传感器可以同步、共点测量声场中的声压和振速信息的性能,因而利用一维线阵即可实现目标的空间方位估计,实时性好,且有效降低了实际应用中的硬件要求。仿真分析了点源与非点源目标的方位估计性能,结果表明提出的方法切实可行。

In order to get the spatial direction-of-arrival estimation of coherent sources,computed angle-of-arrival transient imaging（CAATI） algorithm was introduced in the vector sensor array,and CAATI algorithm using a vertical vector sensor array was proposed.It not only has the advantages of small number of snapshots,less computation and high estimation accuracy,but also has the capability of a vector sensor which can measure the acoustic pressure and particle velocity simultaneously and colocately,so the spatial direction-of-arrival of the target can be achieved with one dimension line array.The algorithm has better real time capability and lower hardware requirement in the practical application.The performance of the direction-of-arrival estimation was simulated and analyzed.The simulation results show that the proposed method is feasible.