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论文:2015,Vol:33,Issue(5):843-848 |
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引用本文： |
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吴姚振, 杨益新, 杨龙, 王永威. 基于恒定束宽波形保真及干扰抑制的水下目标识别方法[J]. 西北工业大学学报 |
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Wu Yaozhen, Yang Yixin, Yang Long, Wang Yongwei. Underwater Target Recognition Based on Constant-Beamwidth Waveform Fidelity and Interference-Suppression[J]. Northwestern polytechnical university |
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| 基于恒定束宽波形保真及干扰抑制的水下目标识别方法 |
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| 吴姚振, 杨益新, 杨龙, 王永威 |
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| 西北工业大学 航海学院, 陕西 西安 710072 |
| 摘要: |
| 水下目标辐射噪声通过阵列波束形成后易造成波形失真,且受干扰的影响,严重降低了目标的识别效果。为此提出了恒定束宽波形保真及干扰抑制的水下目标识别方法。该方法通过二阶锥规划方法设计恒定束宽波束形成器,用以实现波形保真并滤除干扰源的影响,结合人耳听觉感知机理和经典的DEMON分析,提取出有效反映目标类别属性的联合特征矢量。针对直线阵,利用单水听器获得的真实目标辐射噪声,仿真了干扰条件下阵列输出信号并开展识别实验,结果表明所提出的水下目标识别方法可以有效实现目标的准确分类,且对目标形态有着良好的宽容性。 |
| 关键词:
恒定束宽
干扰抑制
水下目标识别
特征提取
DEMON分析
二阶锥规划
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| Underwater Target Recognition Based on Constant-Beamwidth Waveform Fidelity and Interference-Suppression |
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| Wu Yaozhen, Yang Yixin, Yang Long, Wang Yongwei |
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| College of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| In the presence of interference, the recognition performance of underwater target radiated noise severely degrades due to waveform distortion after array beanforming. Based on constant-beamwidth and interference-suppression, a new method of underwater target recognition algorithm is proposed to improve the fidelity of waveform in this paper. In this method, the second-order cone programming (SOCP) is exploited to deal with signal distortion of broadband constant-beamwidth beamforming. Combining SOCP with auditory filtering techniques, we extract intrinsic features of the targets to effectively distinguish them from each other. Based on array signal simulated from the ship-radiated noise collected by a hydrophone, the results and their analysis demonstrate preliminarily the effectiveness of the proposed algorithm in target classification. |
| Key words:
array processing
backpropagation algorithms
beamforming
computer simulation
discrete Fourier transforms
efficiency
feature extraction
filter banks
hydrophones
interference suppression
target tracking
constant beamwidth
DEMON analysis
second-order cone programming (SOCP)
underwater target recognition
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| 收稿日期: 2015-04-16
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(11274253)资助 |
| 通讯作者:
Email： |
| 作者简介: 吴姚振(1985—),西北工业大学博士研究生,主要从事水声信号处理与目标识别研究。
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相关文献: |
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1．吴姚振, 杨益新, 田丰, 杨龙, 陶灿.基于Gammatone频率离散小波系数的水下目标鲁棒识别[J]. 西北工业大学学报, 2014,32(6): 906-911 |
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