基于高分辨距离像的MIMO雷达波形设计

波形设计关系到多输入多输出（multiple input multiple output, MIMO）雷达目标检测和参数估计的性能，设计与目标高分辨距离像相匹配的发射波形可以提高雷达目标探测效果。在建立单站MIMO雷达模型的基础上，以最大化系统输出信号与干扰噪声比为准则，研究了波形设计的目标函数和约束条件，并在推导目标函数相位梯度的基础上提出了一种相位域恒模共轭梯度算法来解决该波形设计问题。仿真实验表明，由该算法设计的MIMO雷达相位编码信号可以在多次迭代后逼近理论最优波形的性能，该算法具有收敛速度快、性能稳定、运算量低的特点。

MIMO radar waveform design based on high-resolution range profile

Waveform design affects the performance of target detection and parameters estimation of the multiple input multiple output (MIMO) radar. The detection performances can be improved by matching waveform with the high resolution range profile of the target. The objective function and constraints are studied to maximize system SINR on the basis of the model of a colocated MIMO radar. The phase gradient of the objective function is studied, and a phase domain costant modul conjugate gradient method is introduced for designing the transmit waveform. The simulation result indicates that the performance of the designed waveform can approach that of the theoretical optimum waveform, and the new algorithm is preferable for its low complexity, better convergence and stability.