摘要
为了研究声图测量过程中由于采用稀疏阵引起的声干涉对聚焦波束形成的影响,分析了声干涉现象产生的原因,对比分析了阵列稀疏对于远场波束形成与近场聚焦波束形成影响的异同,及其对宽带信号及窄带信号影响的异同.根据对比分析认为,近场宽带信号处理的方式受阵列稀疏的影响较小,但实际舰船目标往往含有强线谱信号,因此测量过程预先通过谱白化处理是必要的.对上述宽带稀疏阵的测量方法进行了实验验证,给出了定位结果,结果表明方法切实可行.
The causes of interference phenomenon were analyzed to better understand the influence of sound interference on focus beam forming when using a sparse array in underwater acoustic image measurement.The differences between normal beam forming in the far field and focus beam forming in the near field were also compared.The differences between the narrow band signal and the wide-band signal were also analyzed.The results indicated that wide-band signal processing in the near field was less affected by characteristics of the spare array.Because normal ships often produce strong narrow band signals,spectrum whitening in advance was necessary.Experiments validated the method and proved it was feasible.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2010年第9期1161-1166,共6页
Journal of Harbin Engineering University
基金
国防科技工业委员会基础研究基金资助项目(401501040104)
关键词
声图测量
稀疏阵列
聚焦波束形成
干涉
underwater acoustic image measurement
sparse array
focused beam-forming
interference
