摘要
针对多波束系统不能分辨波束宽度内目标方位的问题,提出了基于分裂波束和互功率谱方位估计方法的波束宽度内多目标判别方法.通过对目标声学亮点结构及多目标方位特征进行研究,分析了单目标和多目标回波信号之间的差异特征;采用对目标回波信号进行时域分割的方法,通过分析回波信号不同子帧间目标相位的变化规律,提出波束宽度内多目标的判别准则;在一定信噪比条件下,采用五个亮点的目标回波信号模型对所提方法进行了仿真验证.仿真结果验证了所提方法的有效性和正确性.
To solve the problem of multi-beam system cannot distinguish targets azimuth that within beam width, a multi-target discrimination method was proposed based on split beam and cross power azimuth estimation method. The target highlights structure and multi-target azimuth characteristics were studied. The echo signal disparity between single-targets and multi-targets was analyzed. The echo signal phase variation between sub-frames was analyzed by time-domain segmentation method. The discrimination criterion of multi-target within beam width was presented. Under the certain SNR （signal to noise ratio） conditions, the proposed method was verified through simulation by using five highlights target echo model, and the simulation results verified the validity and correctness of the proposed method.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第12期73-76,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61074191)
关键词
鱼雷
多目标分辨
互谱法
波达方向
时域分割
torpedo
multi-target distinguish
cross-spectral
DOA （direction of arrival）~ time-do-main segmentation
