摘要
该文提出一种基于MUSIC算法的L型阵列多输入多输出雷达降维波达方向(DOA)估计算法。该算法首先针对L型阵列导向矢量的结构,构造出一个降维矩阵,将回波信号转换到低维空间。然后利用二次优化方法将2维DOA估计分解为两个1维DOA估计。最后利用MUSIC空间谱估计其中1维角度,并利用求得的角度回代谱函数,对另1维角度进行求根估计。该算法将2维空间谱搜索降为1维搜索,极大地降低了运算复杂度。理论分析和仿真结果验证了该算法的准确性和可行性。
A reduced-dimensional Direction Of Arrival(DOA) estimation method in monostatic MIMO radar with L-shaped array based on MUSIC algorithm is proposed. Firstly, considering of the steering vector of L-shaped array, a reduced-dimensional matrix is employed to transform the data matrix into a low dimensional space. Then the quadratic optimization algorithm is utilized to decompose two-dimensional(2-D) DOA estimation into two one-dimensional(1-D) DOA estimation. Finally, one of the two angles is estimated by MUSIC spatial spectrum, then the other angle is estimated by Root-MUSIC method with the spatial spectrum function. The proposed method which only requires 1-D search, can greatly avoid the high computational cost within 2-D MUSIC algorithm. Simulation results verify its correctness and feasibility.
出处
《电子与信息学报》
EI
CSCD
北大核心
2014年第8期1954-1959,共6页
Journal of Electronics & Information Technology
基金
新世纪优秀人才支持计划(NCET-11-0827)
哈尔滨市科技创新人才(2013RFXXJ016)
黑龙江省博士后特别资助(LBH-TZ0410)
中央高校基本业务费专项资金(HEUCFX41308)资助课题