摘要
该文系统地研究了最小方差信号无畸变响应(MVDR)聚焦波束形成方法的定位性能,特别是对该方法定位性能受某个参数的影响情况进行了较详细的研究。首先分析了近场情况下线列阵接收信号的模型,然后分别推导了常规聚焦波束形成和MVDR聚焦波束形成的定位原理。仿真比较了这两种定位方法的定位性能,以及MVDR聚焦波束形成被动定位方法在不同的阵元间距和不同的目标距离情况下的定位性能。仿真结果表明,与常规聚焦波束形成相比,MVDR近场聚焦波束形成在提高分辨率的同时,减小了"混叠"影响,具有更为平滑的背景和更低的旁瓣级,同时认为,为了得到比较好的定位效果,目标应处于相对于"近场"的位置,从而为目标精确定位提供依据。
This paper systematically researches the localization performance of the minimum variance distortionless response（MVDR） focused beamforming method and the influences of localization performance caused by some pa-rameters in detail.We analyze the model of the receiving signals of linear array in near-field environment,and deduce the localization principles of the conventional focused beamforming method and MVDR focused beamforming method.We compare the localization performances of these two methods by simulation,and the localization performance of the MVDR focused beamforming method in the case of different array element spacings and target ranges.Simulation result indicates that,compared to the conventional focused beamforming method,the MVDR focused beamforming method can improve the resolution and reduce the influence of ＂aliasing＂ with smoother background and lower side-lobe level.To obtain better location effect,target must be in near-field position.
出处
《鱼雷技术》
2010年第6期436-440,共5页
Torpedo Technology
关键词
被动定位
最小方差信号无畸变响应
聚焦波束形成
分辨率
混叠
近场
passive localization
minimum variance distortionless response（MVDR）
focused beamforming
resolution
aliasing
near-field
