| 组合阵栅瓣抑制方法研究 |
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| 引用本文： | 靳晓宁,王磊,孙长瑜. 组合阵栅瓣抑制方法研究[J]. 微计算机应用, 2011, 32(5) |
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| 作者姓名： | 靳晓宁 王磊 孙长瑜 |
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| 作者单位： | 1. 中国科学院声学研究所,北京,100190;中国科学院研究生院,北京,100190
2. 中国科学院声学研究所,北京,100190 |
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| 基金项目： | 本论文受国家海洋局海洋维权执法目标探测识别与信息传输技术应用研究与示范项目 |
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| 摘 要： | 随着水声探测频带延伸至低频/甚低频段,目前大孔径拖线阵声纳需要处理超过10倍频程的宽带信号.稀疏阵列虽能以较小系统工程代价获得足够窄的波束扫描宽度,但会产生严重的栅瓣效应,使弱目标检测变得困难.为了抑制强十扰的栅瓣效应对弱目标检测的影响,本文将MVDR方法应用于宽带组合阵处理,有效抑制了栅瓣模糊,扩展了处理频带.理论分析表明组合阵MVDR方法与CBF相比,具有显著的栅瓣抑制能力,通过仿真分析和海试数据分析验证了该方法的有效性.
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| 关 键 词： | 甚低频大孔径阵列 稀疏阵列 组合阵 栅瓣 |
A Grating Lobe Restrain Method in Large Aperture Compounding Array |
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| JIN Xiaoning,WANG Lei,SUN Changyu. A Grating Lobe Restrain Method in Large Aperture Compounding Array[J]. Microcomputer Applications, 2011, 32(5) |
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| Authors: | JIN Xiaoning WANG Lei SUN Changyu |
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| Affiliation: | JIN Xiaoning1,2,WANG Lei1,SUN Changyu1(1Institute of Acoustics,Chinese Academy of Science,Beijing,100190,China,2Graduate University of Chinese Academy of Science,China) |
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| Abstract: | Low frequency or very low frequency underwater acoustic detection demands very large array aperture to cover typically at least one decade in the frequency spectrum.In the case of sparse array,the sharper scanning beam width can be obtained without higher systematically engineering cost.But array performance analysis shows that sparse array elements will produce grating lobes that cannot be ignored.This will narrow down the effective processing frequency band.To restrain the impact of grating lobe effect of... |
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| Keywords: | Very low frequency Large aperture array Sparse array Compounding Array Grating lobe |
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