摘要
为提高多波束测深声呐海底成像质量,提出了一种基于多子阵检测法的海底成像技术.其以多子阵检测法得到的高精度、高空间分辨率回波到达时间(TOA)和到达角度(DOA)估计序列为基础,对每个接收窄波束的波束输出信号经采样处理估计各个海底检测点的空间位置和回波强度,并考虑实际水声环境以及角度的影响对成像数据进行修正.由于该方法估计对回波强度与空间位置的解算都源于相同的TOA与DOA数据,所以两者能准确地一一对应,提高了成像质量,湖上试验数据的处理结果表明了该方法的有效性以及良好的空间分辨能力.
To improve the seafloor image quatlty of imaging technology based on the multiple sub-array detection method. From the sequence of the time ot arrival （TOA） and direction of arrival （DOA） of the echo signal from the seafloor which were estimated by the multiple sub-array detection method, the echo intensities of the seafloor detection points were estimated and their spatial lo-cations were calculated after the sampling process of the output signals received by the narrow beams. Considering the effects of an underwater environment and incidence angle, the data was corrected. As the echo intensity and the spatial location estimated by this method come from the same TOA and DOA data, the two kinds of data can accu- rately correspond, which improves the image quality. Moreover, the processing results of experimental data from lakes show the efficiency and relatively good spatial resolution of this method.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第2期197-202,共6页
Journal of Harbin Engineering University
基金
国家"863"计划资助项目(2007AA09Z124)
国家科技部国际合作计划资助项目(2008DFR70320)
国家自然科学基金资助项目(41006057
41076056
60872107)
中国高等学校博士点基金资助项目(20092304110010
20102304120028)
水声技术重点实验室基金资助项目(91407200302100C2005
9140C200403110C20)
中央高校基本科研业务费专项资金资助项目(HEUCFR1012)
关键词
海底成像
多子阵检测法
多波束测深声呐
回波强度
空间位置
seafloor imaging
multiple sub-array detection method
multibeam bathymetric sonar
echo intensity
spatial location
