基于参考距离史的多子阵SAS成像算法

吴浩然; 张非也; 唐劲松; 佟怡铄

doi:10.11999/JEIT200620

基于参考距离史的多子阵SAS成像算法

doi: 10.11999/JEIT200620

1.
海军工程大学电子工程学院武汉 430033
2.
海军工程大学科研处武汉 430033

基金项目: 国家自然科学基金(41906162)

详细信息

作者简介:
吴浩然：男，1989年生，博士，讲师，研究方向为水声信号处理

张非也：男，1990年生，硕士，助理研究员，研究方向为水声信号处理

唐劲松：男，1964年生，博士，研究员，研究方向为水声信号处理

佟怡铄：男，1985年生，工程师，研究方向为水声信号处理

通讯作者:
张非也　15608639727m@sina.cn

中图分类号: P733.24
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- 文章访问数: 768
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- PDF下载量: 41
- 被引次数: 0
出版历程
- 收稿日期: 2020-07-24
- 修回日期: 2021-01-19
- 网络出版日期: 2021-01-29
- 刊出日期: 2021-03-22

A Imaging Algorithm Based on the Reference Range History for the Multiple Receivers Synthetic Aperture Sonar

1.
College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China
2.
Research Department, Naval University of Engineering, Wuhan 430033, China

Funds: The National Natural Science Foundation of China (41906162)

摘要

摘要: 为了解决现有多子阵合成孔径声呐(SAS)成像算法忽略了“非停走停”时间的孔径依赖性带来时延误差的问题，该文提出一种基于参考距离史的多子阵SAS成像算法。首先利用参考子阵与各子阵之间的平移关系，推导每个子阵的近似距离史，解决“非停走停”时间的孔径依赖性需要被近似的问题；然后将每个子阵信号搬移至相同的波束中心距离后，通过方位重构方法将欠采样的多子阵信号转变成满足采样定理的等效单基站信号，再用单基站成像算法处理得到多子阵SAS的成像结果；最后通过仿真实验和实测数据检验算法的有效性。
- 多子阵合成孔径声呐 /
- 参考距离史 /
- 相对距离偏移量
Abstract: To address the problem that the aperture-dependence of ‘non-hop-go-hop’ time in the existing imaging algorithm for the multiple receivers Synthetic Aperture Sonar(SAS) is ignored and brings the delay error, a imaging algorithm based on the reference range history is proposed in the paper. Firstly, the shifting relationship between the reference receiver and the other receivers is used to derive the approximated range history of every receiver, which conquer the problem of ignoring aperture-dependence of ‘non-hop-go-hop’ time. Then, after the echo signal of each receiver is shift to the same beam centre range, the undersampling multiple receivers signal can be transformed into the single receiver signal by the azimuth reconstruction, which can be processed by the monostatic imaging algorithm to get imaging result. Finally, the validity of proposed algorithm is tested by the simulation experiments and real data.
- Multiple receivers Synthetic Aperture Sonar(SAS) /
- Reference range history /
- Relative range offset

HTML全文

图 1 斜视多子阵SAS模型

下载: 全尺寸图片幻灯片

图 2 参考阵与接收阵i的精确距离史曲线

下载: 全尺寸图片幻灯片

图 3 在不同条件下修正DPCA和RRH方法的误差

下载: 全尺寸图片幻灯片

图 4 在不同斜视角下修正DPCA和RRH的成像结果

下载: 全尺寸图片幻灯片

图 5 不同斜视角下P₅的方位向剖面

下载: 全尺寸图片幻灯片

图 6 修正DPCA和RRH的实测成像结果

下载: 全尺寸图片幻灯片

表 1 P₅的成像质量参数比较

方法	斜视角	方位向 IRW(cm)	方位向 PSLR(dB)	方位向 ISLR(dB)	距离向 IRW(cm)	距离向 PSLR(dB)	距离向 ISLR(dB)
修正DPCA	4.4°	7.34	–16.41	–14.09	3.89	–13.14	–10.09
修正DPCA	12.4°	7.13	–16.14	–12.10	4.00	–12.52	–9.80
RRH	4.4°	7.34	–16.83	–14.26	3.89	–13.11	–10.25
	12.4°	7.50	–17.38	–14.05	3.90	–13.21	–10.31

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