摘要
根据最佳检测理论以及绝对最佳空间滤波器概念,给出了一种最佳空间滤波器的完整表达式。利用真实舰船航行辐射噪声作为目标及干扰,正态分布高斯白噪声作为噪声背景,在基元等间隔线阵上实现了最佳空间滤波器。给出了不同情况下常规波束形成及最佳空间滤波器处理基阵输出波束图。海上试验数据的实验室分析证明,此最佳空间滤波器能够有效地抑制弱信号附近空间不同方位的数个强干扰,完成指定弱信号的检测,而且该最佳空间滤波器可以方便、实时地在现役数字化声呐装备上实现。
Based on the concept of optimum detection theory and optimum spatial filtering theory, the expression of OSF (optimum spatial filter) in frequency domain is derived. The realization of OSF in the case of real target radiated noise in the background of Gaussian white noise for equal spaced line array is illustrated. The beam patterns of CBF (conventional beamforming) system and OSF system are compared. The analysis of at sea experiment data shows that the OSF described in this paper can effectively suppress multiple interferences, which come from in the neighbourhood of target direction and extract the weak signal. This kind of OSF can be easily implemented in digital sonar system.
出处
《声学学报》
EI
CSCD
北大核心
2004年第2期143-148,共6页
Acta Acustica
