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论文:2017,Vol:35,Issue(3):480-485 |
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引用本文： |
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王奇, 陈航, 王英民, 诸国磊. 浅海环境下稳健的最小二乘匹配场定位算法[J]. 西北工业大学学报 |
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Wang Qi, Chen Hang, Wang Yingmin, Zhu Guolei. Robust Matched Field Localization Algorithm Based on Least Squares in Shallow Water[J]. Northwestern polytechnical university |
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| 浅海环境下稳健的最小二乘匹配场定位算法 |
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| 王奇, 陈航, 王英民, 诸国磊 |
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| 西北工业大学 航海学院, 陕西 西安 710072 |
| 摘要: |
| 匹配场处理在海洋环境参数估计领域具有优于常规算法的性能，但其对噪声及环境扰动十分敏感，制约了该方法的应用。为了提高匹配场处理的稳健性，提出了浅海环境下稳健的最小二乘匹配场定位算法。该方法用简正波模型把浅海环境的声场分解为模态函数矩阵和模态系数向量，把环境扰动构建为模态函数的扰动，并在最小范数意义下用最小二乘算法对噪声和环境扰动进行约束，从而提高了匹配场处理的稳健性和定位性能。最后，使用海试实验数据对最小二乘匹配场处理器进行了验证。结果表明：和常规匹配场处理器相比，该算法的峰值背景比提高了约0.6~1.7 dB，而且对声源位置参数的估计更准确。 |
| 关键词:
匹配场处理
约束优化
协方差矩阵
奇异值分解
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| Robust Matched Field Localization Algorithm Based on Least Squares in Shallow Water |
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| Wang Qi, Chen Hang, Wang Yingmin, Zhu Guolei |
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| School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| The matched field processor(MFP) is prior to the nomal algorithms in the estimation of ocean environmental parameters, but the method is sensitive to the noise and the environmental mismatch, and this disadvantage hinders its application seriously. To overcome this shortcoming and improve the performance of MFP, an approach called robust matched field localization algorithm based on least squares(LSMFP) in shallow water is proposed, which decomposes the received fields in the shallow water into depth function matrixes and amplitudes of normal mode at the beginning. Then the environmental mismatch is considered as some noise, and combined with the other noise using the least squares in the sense of minimum norm, therefore the performance of MFP is improved. In the end, the vertical array data from the sea trials is used to evaluate the algorithm. The results show that the power to background ratio(PBR) of LSMFP is lager about 0.6~1.7dB than CMFP, and the localization is more accurate. |
| Key words:
matched field processing
constrained optimization
covariance matrix
singular value decomposition
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| 收稿日期: 2016-10-17
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金青年科学基金（51309191）与中央高校基本科研业务费专项资金（3102017zy010）资助 |
| 通讯作者:
Email： |
| 作者简介: 王奇(1983-),西北工业大学助理研究员,主要从事水声信号处理研究。
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| 作者相关文章 |
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| 王奇 在本刊中的所有文章 |
| 陈航 在本刊中的所有文章 |
| 王英民 在本刊中的所有文章 |
| 诸国磊 在本刊中的所有文章 |
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相关文献: |
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1．王奇, 王英民, 苟艳妮.前后向平均匹配场处理[J]. 西北工业大学学报, 2014,32(4): 593-598 |
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