基于四元数和增广矩阵束的MIMO雷达角度估计算法

Angle Estimation in Bistatic MIMO Radar Based on Quaternion and MEMP

通过研究多输入多输出(Multiple input and multiple out,MIMO)雷达的角度估计算法,基于收发共址的十字阵MIMO雷达系统,将四元数理论应用到MIMO雷达角度中,提出了一种新的参数估计算法。通过构造四元数模型,结合增广矩阵束(Matrix enhancement and matrix pencil,MEMP)方法构造增广矩阵,并证明该矩阵的秩等于目标总数,且不受目标相干性的影响,结合ESPRIT算法实现了对MIMO相干目标的角度估计。算法无需谱峰搜索,能够实现参数的自动配对,同时降低了运算复杂度。仿真实验进一步验证了算法的有效性。

The angle estimation algorithms of multiple input and multiple out （MIMO） radar are studied.Based on cross array in monostatic MIMO radar,a new algorithm for parameter estimation is proposed by employing quaternion theory to angle estimation of MIMO radar.Through the construction of quaternion model,the enhancement matrix,whose rank is equal to the number of targets and has no relations with the coherency of the targets,can be got combining with matrix enhancement and matrix pencil （MEMP） algorithm.Then the two-dimensional angle of coherent targets can be estimated combining with ESPRIT algorithm.This algorithm,avoiding peak searching which consumes much time and realizing angle estimation of coherent targets with automatic pairing,has a lower computation complexity and is more applicable in practice.Simulation results verify that the proposed algorithm is effective.