基于包络补偿的对称三角线性调频连续波雷达多目标参数估计方法

多目标参数估计是对称三角线性调频连续波(STLFMCW)雷达运动目标检测中的一个难题.文章提出了一种利用包络走动现象来实现多目标参数估计的方法.首先建立了多目标的运动模型,通过分析目标的回波信号,推导得出了引起包络走动的误差因子;其次,通过正、负调频峰值配对得到了包含目标速度信息的速度矩阵,利用速度矩阵中的速度对回波信号进行包络补偿,并将补偿后的峰值进行重新配对,得到了模糊目标信息;最后通过剔除虚假目标,获得了准确的目标信息.仿真实验验证了所提方法的准确性和有效性.

Multi-target Parameter Estimation in Symmetry Triangular LFMCW Radar Based on Envelope Compensation

Multi-target parameter estimation is a difficult problem in moving target detecting of symmetry triangular linear frequency modulation continuous wave ( STLFMCW) radar.A method for multi-target parameter estimation,which mainly uses the envelope migration,is proposed.Firstly,the motion model of multi-target is established,and the error factor which causes envelope migration is derived by analyzing the echo signal of the targets.Then,the velocity matrix,which con-tains the velocity information of targets,is obtained by pairing the peaks value of positive frequency modulation signal and negative frequency modulation signal.Furthermore,the ambiguous targets can be detected by using the velocity matrix to a-chieve the echo’ s envelope migration compensation and then re-pairing the compensated peaks.Finally,the targets accurate information is obtained by rejecting the false targets.The effectiveness of the proposed method is demonstrated by simula-tions.