摘要
由于拖船噪声是一种具有多途角扩展的宽带相干强干扰,拖船噪声抑制是拖线阵声呐系统中的关键技术之一。根据最优传感器阵列处理和匹配场处理的概念,提出两种稳健的匹配场噪声抑制方法:多约束匹配场噪声抑制和匹配场波束形成后噪声抑制。理论与仿真分析均表明,稳健的匹配场噪声抑制方法比常规波束形成器、最小方差无失真响应波束形成器、以及以往的匹配场噪声抑制方法具有更优越的性能。
Towing ship noise is a kind of wideband interference with strong multi-path and angle dispersion for a towed line array sonar system. Based on the novel concept of matched field noise suppression （MFNS） proposed by the authors, two robust MFNS methods were presented to cancel the towing ship noise. Of them one is multiple constraints MFNS and the other is matched field postbeamformer interference canceller（MF-PIC）. The prominent advantage of the methods is that it can suppress the towing ship＇s noise for all arrival directions and keep signal power with robustness. The efficacy of the methods was verified by simulation.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2005年第6期746-750,共5页
Acta Armamentarii
基金
国家自然科学基金资助项目(10304015
60472073)
关键词
声学
水声工程
噪声抑制
声呐信号处理
匹配场
acoustics
underwater acoustic engineering
noise suppression
sonar signal processing
matched field
