论文部分内容阅读
研究一种基于电磁矢量传感器阵列的多输入多输出(MIMO)雷达目标波离角(DOD)和波达角(DOA)的联合估计算法。提出了一种新型MIMO雷达系统,发射阵列采用常规阵元,而接收阵列采用电磁矢量传感器,在此基础上,算法首先利用矢量传感器的内在结构特点结合子空间旋转不变性质获得目标DOA预估计,随后采用最佳加权子空间拟合算法对DOD和DOA分别进行一维搜索,即可获得目标角度的高精度估计,并讨论了阵列结构对目标DOD和DOA精度的影响。与已有算法相比,该算法适用于不规则阵列结构,且具有无需配对和二维搜索等特点。仿真验证了算法的有效性,其估计精度与CRB界接近。
A joint estimation algorithm of DOA and DOA of multiple input multiple output (MIMO) radar based on electromagnetic vector sensor array is studied. A new type of MIMO radar system is proposed. The transmitting array adopts the conventional array element, and the receiving array uses the electromagnetic vector sensor. Based on the above, the algorithm first uses the inherent structure of the vector sensor and the subspace rotation invariant property to obtain the target DOA pre-estimation , And then use the best weighted subspace fitting algorithm to search the DOD and DOA respectively one by one to get the high accuracy estimation of the target angle and discuss the influence of the array structure on the target DOD and DOA accuracy. Compared with the existing algorithms, this algorithm is suitable for irregular array structure and has the characteristics of no pairing and two-dimensional search. The simulation results show the effectiveness of the proposed algorithm and its accuracy is close to that of CRB.