受浅海多途效应的影响，传统方位估计方法在空间谱上将出现谱峰偏离甚至分裂现象。针对这一问题，提出了一种新的浅海稳健方位估计方法。该方法将简正波模型与阵列信号模型相融合，推导出新的阵列源矢量形式，并结合矢量最优化对阵列源矢量误差施加有效约束，进而提高高分辨方位估计的稳健性。性能仿真分析表明：当存在海水跃变层深度、海水深度及声速梯度等不确定条件下，该方法均具有更高的主峰与旁瓣比以及更窄的-3 dB波束宽度。%Due to the multi-path effect ,there exist some errors or biases in the bearing estimation with the traditional bearing estimation methods .To a certain extent ,even a spatial spectrum split appears . In order to solve these problems ,a new shallow-water robust bearing estimation method is proposed . The method can derive a vector optimization made by combining the normal mode theory with the ar-ray signal model to impose effective constraints on the actual source vectors thus to improve the ro-bustness for the high-resolution bearing estimation .The computer simulation results show that the proposed method has a higher peak to sidelobe ratio (PSR) and a lower -3 dB beam width under un-certain conditions of water thermocline depth and sound velocity gradient .
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