浅海远程目标稳健方位估计方法性能分析  

Performance analysis of shallow-water long-range target robust bearing estimation method

作　　者：宋海岩[1] 刘伯胜[2] 

机构地区：[1]黑龙江工程学院电气与信息工程学院,哈尔滨150050 [2]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《海军工程大学学报》2014年第2期64-67,共4页Journal of Naval University of Engineering

基　　金：教育部博士点基金资助项目(20122304120011);中央高校基础科研业务费专项基金资助项目(HEUCFR1119)

摘　　要：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-3dB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.

关 键 词：方位估计 浅海 多途 矢量最优化 稳健性 

分 类 号：TB556[理学—物理]