摘要
针对频率分集技术,与非均匀阵列、压缩感知理论相结合,实现目标距离-角度的联合估计。通过频率分集技术提高信号空间自由度,将距离参数引入导向矢量矩阵,实现距离-角度参数的联合。并结合嵌套阵列,显著提高雷达阵列孔径。该方法针对嵌套阵虚拟阵列流型矩阵的优化过程导致的秩亏缺问题,传统的空间平滑算法会以牺牲部分阵列孔径为代价将单快拍问题转化为多快拍问题,采用正交匹配追踪算法可以实现单快拍下的高精度参数估计,避免了空间平滑技术对阵列孔径的影响。并通过压缩感知理论的应用降低信号维度,减小了计算复杂度。
With frequency diversity technology,combined with non-uniform array and compressed sensing theory,joint estimation of target distance and angle is achieved.Frequency diversity could improve the DOFs of signal and bring range into steering vector,which makes the joint of range and DOA feasible.Employing Nested array,the aperture of radar is significantly enhanced.The process of obtaining coarray will lead to rank deficiency,and spatial smoothing algorithm can resolve this problem at the cost of aperture reduction,transferring the single-snapshot problem into a muti-snapshot problem.OMP algorithm could achieve accurate estimation of parameters without aperture reduction.The application of compress sensing could achieve dimension reduction of signal,which will reduce computational complexity.
作者
庞帅轩
张中方
郭岩
PANG Shuai-xuan;ZHANG Zhong-fang;GUO Yan(ShenYang Aircraft Design And Research Institute of Aviation Industry Corporation of China,ShenYang 110000,China;First Military Representative Office of Military Representative Bureau of AirForce Equipment Department stationed in ShenYang Area,ShenYang 110000,China)
出处
《航空电子技术》
2022年第3期25-32,共8页
Avionics Technology
基金
国家自然科学基金(61773262,62006152)
中国航空科学基金会(20142057006)。
关键词
雷达工程
参数估计
嵌套阵列
压缩感知理论
正交匹配追踪算法
radar engineering
parameter stimation
nestedarray
theory of compress sensing
orthogonal matching pursuit(OMP)algorithm
