浅海中单矢量水听器高分辨方位估计方法

摘要

为了提高单矢量水听器高分辨方位估计在浅海环境中的性能，充分考虑信道对声传播的影响，将海洋声传播物理模型与稳健自适应波束形成方法相结合，并根据单矢量水听器阵列流型的特点提出了基于简正波理论的单矢量水听器矢量最优化算法，实现了单矢量水听器的高分辨方位估计。计算机仿真结果表明，该算法依靠单个矢量水听器便可实现窄带信号和宽带信号的高分辨方位估计，并且在足够的信噪比下，能够达到无偏估计。海试数据处理结果验证了算法的正确性和有效性。%In order to increase the performance of the high-resolution DOA estimation for the single vector hydro-phone in shallow seas, the impact caused by the channel on sound propagation is fully considered. By combining the ocean sound propagation physical model and the robust adaptive beamforming method, the vector optimization algorithm based on the single vector hydrophone and normal mode theory is proposed according to the array manifold characteristics of the single vector hydrophone then the high-resolution DOA estimation of the single vector hydro-phone is realized. Simulation results show that the algorithm may realize the DOA estimation of narrowband and wideband signals only by utilizing a single vector hydrophone, in addition, when the SNR ( signal-to-noise ratio) is high enough, the estimation without bias may be realized. The results of the sea trial data processing verify the ac-curacy and effectiveness of the algorithm.