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论文:2014,Vol:32,Issue(4):593-598 |
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引用本文： |
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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 |
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Wang Qi, Wang Yingmin, Gou Yanni. A Matched Field Processor Using Forward/Backward Averaging Algorithm[J]. Northwestern polytechnical university |
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| 前后向平均匹配场处理 |
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| 王奇, 王英民, 苟艳妮 |
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| 西北工业大学 航海学院, 陕西 西安 710072 |
| 摘要: |
| 为了提高匹配场被动定位的稳健性,提出了一种基于白噪声增益约束的前后向平均匹配场处理器。算法不仅使用了白噪声增益约束了权向量,而且针对垂直线列阵在空间上均匀分布的特点,在估计协方差矩阵时使用了前后向平均算法,因此提高了目标检测和定位的性能。同时由于前后向平均算法在估计协方差矩阵时能够把复数运算转化为实数运算,大量减小了运算量。为了验证算法的性能,使用仿真数据和海试数据进行了处理分析。结果表明,和前向平均匹配场处理器相比,该算法的输出信干比提高了约1.5～5 dB,峰值背景比提高了约1～4 dB。 |
| 关键词:
匹配场处理器
被动定位
白噪声增益约束
前后向平均算法
协方差矩阵
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| A Matched Field Processor Using Forward/Backward Averaging Algorithm |
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| Wang Qi, Wang Yingmin, Gou Yanni |
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| College of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| In order to enhance the robustness of the passive location of the matched field processor, we propose a matched field processor that uses the forward/backward (FB) averaging algorithm and the white noise gains con-straint. The processor not only restrains the weight vector of the matched field with white noise gains but also esti-mates the sample covariance matrix with the FB averaging algorithm that utilizes the spatially uniform distribution characteristics of the vertical linear array, thus enhancing the target detection and location of the matched field. The FB averaging algorithm can also transform complex number operation into real number operation when estimating the covariance matrix, thus greatly reducing the computational complexity and the computational volume. Finally we use the simulation data and sea test data to locate the source. The location results, given in Figs. 2 through 6, and their comparison show preliminarily that the output signal to interference ratio increases by about 1?5 to 5 dB, and that the peak to background ratio increases by about 1 to 4 dB. |
| Key words:
algorithms
computational complexity
covariance matrix
estimation
location
robustness(control systems)
target tracking
white noise
forward /backward (FB) averaging algorithm
matched field processor
passive location
white noise gains constraint
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| 收稿日期: 2013-11-01
修回日期:
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| DOI: |
| 基金项目: 西北工业大学基础研究基金(NPU-JC20110211)资助 |
| 通讯作者:
Email： |
| 作者简介: 王奇(1983-),西北工业大学博士研究生,主要从事信息与信号处理研究。
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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 |
| 王英民 在本刊中的所有文章 |
| 苟艳妮 在本刊中的所有文章 |
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参考文献: |
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[1] Baggeroer A B, Kuperman W A, Mikhalevsky P N. An Overview of Matched Field Methods in Ocean Acoustics [J]. IEEE Journal of Oceanic Engineering, 1993, 18(4): 401-424
[2] 杨坤德, 马远良. 基于扇区特征向量约束的稳健自适应匹配场处理器 [J]. 声学学报, 2006, 31 (05): 399-409 Yang Kunde, Ma Yuanliang. Robust Adaptive Matched Field Processing with Sector Eigenvector Constraints[J]. Acta Acustica, 2006, 31 (05): 399-409 (in Chinese)
[3] Debever C, Kuperman W A. Robust Matched-Field Processing Using a Coherent Broadband White Noise Constraint Processor [J]. The Journal of the Acoustical Society of America, 2007, 122(4): 1979-1986
[4] Trees H L V. Optimum Array Processing: Part IV of Detection, Estimation, and Modulation Theory [M]. New York: Wiley-Interscience, 2002: 1443
[5] Krolik J L. The Performance of Matched-Field Beamformers with Mediterranean Vertical Array Data [J]. IEEE Trans on Signal Processing, 1996, 44(10): 2605-2611
[6] 张歆, 张小蓟, 李斌. 基于 Kraken 简正波模型的浅海声场分析 [J]. 西北工业大学学报, 2000, 18(03): 405-408 Zhang Xin, Zhang Xiaoji, Li Bin. An Analysis of Shallow Water Channel Using Kraken Normal Model[J]. Journal of Northwestern Polytechnical University, 2000, 18(03): 405-408 (in Chinese) |
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