摘要
针对空间谱估计算法复杂度高的问题,引入传播算子用于双基地多输入多输出雷达的二维离开角和二维到达角估计.通过信号协方差矩阵求出传播算子,利用传播算子的旋转不变性估计方向矩阵,进而计算离开角和到达角.该算法运算复杂度低,能实现多维角度的自动配对,且在相近角度情况下仍能保持良好的性能.在高信噪比情况下,算法性能接近ESPRIT.此外还推导了角度估计均方误差.仿真结果表明了该算法的有效性.
Computation complexity of spatial spectrum estimation algorithm is high. To solve this problem, a PM algorithm is introduced for estimation of 2D direction of departure （DOD） and 2D direction of arrival （DOA） for bistatic MIMO radar. A propagator is estimated using the cross correlation matrix. By rotation invariance of the propagator, one can estimate the direction of the matrix, and further estimate DOD and DOA. The algorithm has low computation complexity, and can achieve multidimensional automatic pairing. With similar angles, good performance is still maintained. In the case of high SNR, performance of the proposed algorithm is close to that of the ESPRIT. Mean square error of angle estimation is derived. Simulation results verify the usefulness of the algorithm.
出处
《应用科学学报》
CAS
CSCD
北大核心
2014年第1期57-64,共8页
Journal of Applied Sciences
基金
国家自然科学基金(No.61371169)
航空科学基金(No.2009ZC52036)
南京航空航天科研基金(No.NS2013024)
南京航空航天大学研究生创新基地实验室(No.kfjj130114)资助
关键词
多输入多输出雷达
离开角
到达角
自动配对
传播算子算法
multiple-input multiple-output （MIMO） radar, direction of departure （DOD）, direction of arrival（DOA）, automatic pairing, propagator method
