双基地多载频MIMO雷达目标运动参数估计

双基地多载频多输入多输出(multiple-input multiple-output,MIMO)雷达采用稀布阵发射多载频调频连续波(frequency modulated continuous wave,FMCW)信号,阵列接收目标回波。本文分析了双基地多载频MIMO雷达的信号模型,提出将多项相位变换和解调频技术结合来进行目标运动参数估计的方法,从而大大减少了运算量。针对多载频MIMO雷达提出了一种新的解速度模糊方法,该方法原理简单、易于工程实现,且速度估计精度较高。仿真结果表明,本文方法能够对目标运动参数进行有效估计。

Movement parameter estimation of targets in bistatic multi-frequency MIMO radar

The bistatic multi-frequency Multiple-Input Multiple-Output(MIMO) radar uses sparse-array to transmit the frequency modulated continuous wave(FMCW) signal of multiple carrier frequencies and uses an array to receive the echoes.The signal model of a bistatic multi-frequency MIMO radar is analyzed in this paper.A method combining discrete polynomial-phase transform with dechirping is presented to estimate the movement parameter of targets,which reduces the computational complexity dramatically.A new method for multi-frequency MIMO radar is presented to resolve the velocity ambiguity problem.Being Simple and easy to implement,this method can obtain a high-accuracy estimation of velocity.The simulation indicates that the method presented in this paper can estimate the movement parameters of targets effectively.