摘要
对几种主要的角分辨率准则进行了综述及对比研究。首先分析了单目标的半功率点宽度(3dB波束宽度),讨论了不同窗函数加权及波束扫描对波束宽度的影响,并比较了不同谱估计方法分辨率的定量公式。更一般地,对于双目标情形,分析了双目标谱均值与双目标中点谱值比较、目标测角均方差、目标分辨概率三种不同分辨率准则的应用范围及影响因素,推导了基于中值比较法的最小方差信号无畸变响应波束形成器(MVDR)角分辨率理论公式,计算机仿真实验证实了上述结果,并提出相应修正。
The paper overviews and compares the main angular resolution criteria.Angular resolution for single source scenario is usually denoted by half-power bandwidth,namely 3dB beamwidth in spatial domain.Beam scanning and window function's weightings have different influences on the 3dB beamwidth.The results of 3dB beamwidth for several spectral estimators are included.Furthermore,several angular resolution criteria for two sources are introduced.The above analyses are verified by computer simulation results.
出处
《雷达科学与技术》
2010年第4期382-389,共8页
Radar Science and Technology
基金
全国优秀博士论文作者专项基金(No.200340)
关键词
角分辨率
3dB波束宽度
瑞利限
最小方差信号无畸变响应
angular resolution
3dB beamwidth
Rayleigh limit
minimum variance distortionless signal response(MVDR)