宽带波束域高分辨方位估计方法的性能研究

宽带波束域处理是实现水下目标高分辨方位估计的重要途径.文中应用宽带阵增益分析研究了宽带波束域高分辨估计方法的统计性能,通过仿真计算了宽带阵增益和宽带波束域高分辨方法方位估计误差.研究揭示了宽带阵增益是波束域高分辨方法获得良好性能的本质,阐明了其性能与波束数目、相邻波束重叠量的关系,并给出了波束数目、波束重叠量的选择准则.

The Performance of the Broadband Beam Space High Resolution DOA Estimator

Broadband beam space processing is an effective technique to realize broadband DOA estimation of underwater targets. The statistical performance of the broadband beam space high resolution algorithm is studied by using the broadband array gain analysis of multiple beam system. The broadband array gain and mean square error of the beam space DOA estimator are computed by computer simulations. The research results shows that the broadband array gain improves the performance of the broadband beam space algorithm. The relationship between the performance of the broadband beam space algorithm and the key factors such as beam number, beam overlap is given. The criterion to select the beam number and beam overlap is also determined.