|本期目录/Table of Contents|

[1]李 建*,高明生,解 恺.线阵阵形畸变对目标方位估计性能影响及校正分析[J].南京大学学报(自然科学),2015,51(6):1195-1202.[doi:10.13232/j.cnki.jnju.2015.06.015]
 LiJian*,GaoMingsheng,XieKai.Research on impact of shape distortion on the target azimuth estimation for soft linear array[J].Journal of Nanjing University(Natural Sciences),2015,51(6):1195-1202.[doi:10.13232/j.cnki.jnju.2015.06.015]
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线阵阵形畸变对目标方位估计性能影响及校正分析()
     

《南京大学学报(自然科学)》[ISSN:0469-5097/CN:32-1169/N]

卷:
51
期数:
2015年第6期
页码:
1195-1202
栏目:
出版日期:
2015-12-01

文章信息/Info

Title:
Research on impact of shape distortion on the target azimuth estimation for soft linear array
作者:
李 建123*高明生12解 恺4
(1. 河海大学物联网工程学院,常州,213022; 2. 中国科学院声学研究所声场声信息国家重点实验室,北京,100190; 3. 疏浚技术教育部工程研究中心,常州,213022; 4. 中国船舶工业系统工程研究院,北京,100036)
Author(s):
LiJian123* GaoMingsheng12 XieKai4
1. College of IOT Engineering, Hohai university, Changzhou, Jiangsu, 213022,China;
2. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
3. Engineering Research Center of Dredging Technology, Ministry of Education, 213022, China;
4. Systems Engineering Research Institute of CSSC, Beijing, 100036, China
关键词:
阵形畸变方位估计阵形校正
Keywords:
array shape distortion DOA estimation array shape adjustment
分类号:
TB566
DOI:
10.13232/j.cnki.jnju.2015.06.015
文献标志码:
A
摘要:
在水声探测与定位方面,长线阵比舰载声呐有更好的性能,但其极易受到阵型畸变的干扰.通过理论分析、仿真研究以及实验数据处理等方法研究了阵形畸变对线阵到达角估计性能的影响,并提出了一种阵形校正方法.阵形畸变通过对波束成形运算中的导引矢量造成影响,使线阵测向性能劣化甚至失效.在常规线阵波束成形处理器以及自适应波束成形处理器的基础上,为了进行阵形畸变后数据的处理,首先给出一般的任意阵形波束成形算法,然后基于阵元位置误差对信号传输时延的改变,分析了阵形畸变对波束成形的导引矢量的影响.进一步给出了一种声学阵形标定方法,对阵形畸变做出估计并修正导引矢量.通过仿真分析以及实验数据处理可见:阵形畸变对常规波束成形以及自适应波束成形两种处理器均有影响,但比较而言,常规波束成形处理器对阵形畸变的鲁棒性更好一些;进行一定精度的阵形畸变修正后,两种处理器的到达角估计精度以及3分贝主瓣宽度均能得到明显改善.
Abstract:
Long linear array is more important than shipborne sonar in underwater target detecting and positioning, but it seems more sensitive to the shape distortion at the mean while. In this paper, the array shape distortion effect on soft linear array Direction of Arrival (DOA) estimation performance was studied theoretically, then with simulation and field data process, an array calibration method was put forward. The steering vector of beamforming algorithm was changed when array shape was distorted, which will cause the degradation of line array direction performance, so far as to failure. Based on the conventional line array algorithm: Conventional BeamForming (CBF) and Adaptive BeamForming (ABF), in the interest of process the data recorded from the distorted array, this paper first derived the general arbitrary array beamforming algorithm, and based on the impact analysis of array element position error act on the acoustical signal transmission delay, introduced how the beamforming steering vector was influenced by the array shape distortion. Next, an array shape calibration method based on acoustic signal was given, which correct the steering vector through estimating the array shape distortion. At last, the simulation and field data process proved the analysis, the performance of both CBF and ABF beamforming algorithm degradation which caused by the array shape distortion, in contrast, the CBF method was better, it has more robust than ABF method; The accuracy of DOA estimation output and the 3dB width of main lobe have been significantly improved after appropriate array shape distortion adjustment, for both CBF and ABF algorithm. The method mentioned here also useful to analyze the situation of three dimensional space

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备注/Memo

备注/Memo:
基金项目:声场声信息国家重点实验室2015年度开放课题(SKLA201504),国家海洋局南海维权技术与应用重点实验室2013年
度开放基金(1306),河海大学中央高校基金(2013B18514),疏浚技术教育部工程研究中心开放课题(HDCN08003)
收稿日期:2015-07-05
*通讯联系人,E-mail:jian263@sina.com
更新日期/Last Update: 2015-11-14