稀疏阵列L 型MIMO 雷达运动目标三维成像方法

针对L型多输入多输出(Multiple-Input Multiple-Output,MIMO)雷达对空中运动目标三维成像天线数目较多问题,提出了发射阵列采用稀疏布阵的L型MIMO雷达三维成像方法。该文首先分析了MIMO雷达发射阵列的稀疏布阵方式,其次结合压缩感知理论具体阐述了基于稀疏阵列的三维成像方法。该方法在大幅减少L型MI-MO雷达发射天线的条件下,实现了对运动目标的单次快拍三维成像,不仅有效避免了目标机动带来的运动补偿难题,同时又降低了系统的硬件复杂度,便于工程应用。最后利用仿真实验验证了本文方法的有效性和可行性。

Three Dimensional Imaging Method of Moving Target for L type MIMO Radar with Sparse Array

The number of antenna elements of L-type Multiple-Input Multiple-Output(MIMO) radar is quite large when imaging for moving target with single snapshot.To solve this,a 3-D imaging method for L-type MIMO radar based on sparse array is proposed.Firstly,the configuration of sparse transmitting antenna array is analyzed.Then,combining compressed sensing theory,a novel 3-D imaging algorithm based on sparse array is put forward.Under the condition of the reduced number of antenna,3-D imaging for moving target can be implemented by using this algorithm,it not only avoids the difficulty of motion compensation aroused by the target’s maneuver,but also reduces the complexity of the system with advantage to engineering realization.Finally,the effectiveness and feasibility of this algorithm is validated by the simulative results.