摘要
为了讨论混响对双基地声呐探测范围的影响,利用经验证的三维散射模型,讨论在不同入射、散射掠射角和散射方位角约束下的海底散射强度分布.根据双基地配置的几何特性,分析对混响有贡献的界面散射面积.以浅海为例分析比较不同基线长度时,混响与噪声限制下不同位置的目标在接收基地阵元输入端所形成的信干比.结果表明,混响限制下,双基地声呐的探测范围与混响强度相关.由于面临较强前向散射和侧向散射的影响以及直达波的强干扰,在近距离上,将出现探测盲区.
The distribution of sea-floor scattering strength held in the incident grazing angle, scattering graze angle, and scattering azimuthal angle was analyzed using a 3-D model that was validated. A mathematical model of the area contributing to the reverberation was derived. Quantitative analysis was made by accounting for bistatic reverberation and mask effect of the ＂direct blast. ＂ The signal-to-interference at receiver was determined and the detectable area for the different bistatic configuration may be examined. Resuits show that iri reverberation background, the detectable region of bistatic sonar is related to reverberation strength, and there is a mask region within it due to the influence of forward （in-plane） and out-ofplane scattering.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2006年第4期597-602,共6页
Journal of Harbin Engineering University
关键词
混响
双基地声呐
前向散射
侧向散射
探测范围
reverberation
bistatic sonar
forward scattering
out-of-plane scattering
detectable area
