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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。
Aiming at the large number of three-dimensional aerials of L-shaped Multiple-Input Multiple-Output (MIMO) radars for aerial moving targets, a three-dimensional imaging method of L-shaped MIMO radar with sparse array is proposed. Firstly, the sparse arrangement of MIMO radar transmitting array is analyzed. Secondly, the three-dimensional imaging method based on sparse array is elaborated with the theory of compressive sensing. Under the condition of reducing the transmitting antenna of L-shaped MI-MO radar, this method realizes the three-dimensional single shot snapshot of the moving target, which not only effectively avoids the motion compensation problem brought by the target maneuver, but also reduces the hardware of the system Complexity, easy for engineering applications. Finally, the simulation experiment is used to verify the effectiveness and feasibility of the proposed method.