摘要
空气信道中的阵列信号处理技术可以进行多个目标同时定位,经过适配后应用在水下信道中,可以实现水声定位。空间信号到达方向是阵列信号处理的重要环节,利用特征结构的子空间方法确定相同范围内一个或多个信号源的空间地理位置,常用的方法是MUSIC算法和ESPRIT算法。在工程实践中,多个阵元仅有有限路信号采集通道形成受限水声阵列,在受限水声阵列条件下,如何选取阵型,匹配相应算法,对水声定位结果至关重要。选择二维面阵,包括L阵型、双L阵型、均匀面阵型、“口”字阵型,用数据进行仿真验证,分析比较定位效果,结果表明不同阵型匹配相应算法,在定位精度或计算速度方面各有优缺点。针对不同工程需求,可以选取相应的阵型,对实践提供了有效的参考依据。
Array signal processing technology used in air channel can locate multiple targets at the same time.After adaptation,it can be used in underwater channel to realize underwater acoustic location.The direction of arrival(DOA)of spatial signals is an important part of array signal processing.The subspace method of eigenstructure is used to determine the spatial geographic position of one or more signal sources in the same range.The commonly⁃used methods are MUSIC algorithm and ESPRIT algorithm.In the engineering practice,there are only some limited signal acquisition channels for multiple array elements to form the restricted underwater acoustic array.Under the condition of restricted underwater acoustic array,how to select the array formation to match the corresponding algorithm is very important for the results of underwater acoustic positioning.In this paper,two⁃dimensional planar arrays,including L⁃array,double⁃L⁃array,two dimensions equal array and mouth⁃shaped array,are selected.The data was used to perform simulation verification.The positioning effects are analyzed and contrasted.The results show that the different arrays matching corresponding algorithms have their own advantages and disadvantages in positioning accuracy or computing speed.According to different engineering requirements,the corresponding array formation can be selected to provide effective reference.
作者
董真杰
张维全
郑琛瑶
DONG Zhenjie;ZHANG Weiquan;ZHENG Chenyao(Unit 91388 of PLA,Zhanjiang 524022,China)
出处
《现代电子技术》
2022年第15期20-24,共5页
Modern Electronics Technique
关键词
受限水声阵列
定位算法
MUSIC算法
降维MUSIC
ESPRIT
二维面阵
“口”字阵型
定位精度
restricted underwater acoustic array
positioning algorithm
MUSIC algorithm
dimensionality reduction MUSIC
ESPRIT
2D planar array
mouth⁃shaped array
positioning accuracy
