摘要
混响是鱼雷主动自导背景干扰的一部分,混响的建模与仿真对于研究鱼雷声自导系统具有重要意义。混响具有空时特性,利用空时自适应处理方法抑制混响成为一种可能。因此建立能准确反应水下声传播特性的混响模型,并在此基础上研究其空时特性,是声呐空时处理的重要环节。从水下声信号的特点出发,利用单元散射原理,对界面混响进行精细结构建模、仿真。仿真结果表明:该模型除了能比较完整细致地模拟混响的各种统计特性外,还能保持阵元间的空间相关性,而且能体现出混响的空时特性。
Reverberation is the main background noise of the torpedo active sonar,so the reverberation modeling and simulation are great value for the research of acoustic homing system of torpedo.With the space-time characteristics of reverberation,it is possible for using the space-time adaptive processing(STAP)to suppress the reverberation.Thus,it is an important process to build a model of reverberation which can truly represent the characteristics of underwater acoustical signal and to further study the space-time characteristics of the model.In this paper,the mode of interface reverberation is constructed refinedly,and simulated.The results of simulation show that this model can elaborately simulate the diversified characteristics of the reverberation,keep the spatial relativities of each special element,and represent the space-time characteristics of reverberation.
出处
《舰船科学技术》
北大核心
2012年第2期17-21,共5页
Ship Science and Technology
基金
陕西省科学技术研究发展计划资助项目(2010KJXX-09)
水下信息与控制重点实验室基金资助项目
关键词
混响
宽带模型
混响空时谱
reverberation
wideband signal model
space-time spectrum of reverberation
