| 张宾,孙贵青.基于特征频率的拖曳双线阵最优左右舷分辨[J].,2011,30(6):448-454 |
| 基于特征频率的拖曳双线阵最优左右舷分辨 |
| Optimal left/right discrimination based on the characteristic frequency for towed twin-line array |
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| 中文摘要: |
| 左右舷模糊是拖曳单线阵固有的缺陷,而拖曳双线阵具有左右舷分辨能力。本文利用双线阵的指向性函数,通过对双线阵左右舷抑制比的分析,给出使左右舷抑制比最优的特征频率,并提出一种适用于宽带信号的拖曳双线阵左右舷分辨方法。理论分析表明:当目标方位已知时,特征频率仅依赖于双阵问距,且对双阵间距变化有相当的宽容性;基于特征频率的常规波束形成使左右舷抑制比有显著改善。海试结果验证了特征频率的存在,通过对比证明了方法的有效性。 |
| 英文摘要: |
| Left/right ambiguity is an inherent shortcoming for towed single-line array, while
not for twin-line array. According to the analysis of left/right suppression ratio of twin-line
array based on directivity function, the concept of characteristic frequency is defined which
maximizes the left/right suppression ratio, and then a novel method is proposed accordingly to
resolve the left/right ambiguity. The results of theoretical analysis indicate that the
characteristic frequency depends only on the twin-line array spacing and possesses significant
robustness when target’s bearing is known, and the left/right discrimination method based on
the characteristic frequency could improve left/right suppression significantly. Sea trial data
verify the existence of the characteristic frequency and validate this method |
| DOI：10.11684/j.issn.1000-310X.2011.06.008 |
| 中文关键词: 特征频率 左右舷分辨 拖曳双线阵 |
| 英文关键词: |
| 基金项目:国家自然科学基金(60802041)资助项目 |
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