摘要
针对目前综合孔径辐射计圆环格点阵圆心位置固定,不能最大程度利用圆环中可布阵区域的问题,提出圆环格点阵圆心优化方法,在不增大布阵区域的前提下,增加了布阵自由度,为阵列性能进一步优化提供了基础。基于圆心松弛的圆环格点阵,提出一种满足给定无混叠视场范围和空间角分辨率要求的广义圆环格点阵设计方法。基于广义圆环格点阵,当给定阵元数时,依据阵列退化因子优化灵敏度。仿真结果表明:优化后的阵列具有更高的辐射测量灵敏度。
To solve the problem that the center position of circular lattice array(CLA)is fixed,which cannot maximize the usage of deployable ring area,a CLA center optimization method is proposed.Under the premise of keeping the same array arrangement area,this method can increase the degree of freedom of arraying,and improve array performance.Based on center-relaxed CLA,a generalized CLA design method is proposed to satisfy the requirements of given non-aliasing field of view and spatial angular resolution.Based on the generalized CLA,array sensitivity optimization is carried out according to array degradation factor when the number of array elements is given.Simulation results show that the optimized array has higher radiometric sensitivity.
作者
贺锋
李曙光
张悦
胡飞
HE Feng;LI Shuguang;ZHANG Yue;HU Fei(School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;National Key Laboratory of Science and Technology on Multi-Spectral Information Processing,Wuhan 430074,Hubei,China;Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)
出处
《上海航天》
CSCD
2018年第2期29-36,共8页
Aerospace Shanghai
基金
上海航天技术创新基金(SAST2015088)
绿色通信与网络国际联合研究中心项目(2015B01008)
关键词
被动成像
综合孔径辐射计
阵列优化
圆环格点阵
圆心松弛
广义圆环格点阵
模拟退火
温度灵敏度优化
passive imaging
synthetic aperture radiometer
array optimization
circular lattice array
center relaxation
generalized circular lattice array
simulated annealing
temperature sensitivity optimization
