针对宽带雷达舰船一维高分辨距离像(high range resolution profile,HRRP)特征提取问题,提出了一种船长特征提取算法。首先,基于雷达舰船跟踪信息估计出姿态角,并提取运动状态特征;其次,根据边界幅度异常变化判断目标是否存在截像;然后...针对宽带雷达舰船一维高分辨距离像(high range resolution profile,HRRP)特征提取问题,提出了一种船长特征提取算法。首先,基于雷达舰船跟踪信息估计出姿态角,并提取运动状态特征;其次,根据边界幅度异常变化判断目标是否存在截像;然后,根据相邻相关法对齐目标,并剔除异常的HRRP距离像,采用基于门限分割方法提取目标区域,按照一定的投影准则计算船长。所提出的方法测长精度高,通过实测数据验证表明,自动估计船长平均误差在10%以内,具有较强的工程应用价值。展开更多
The approach to estimate the length of extended targets by using the bistatic high resolution range profile( H RRP) is analyzed in this paper. The relationship between the bistatic H RRP and the monostatic H RRP of ...The approach to estimate the length of extended targets by using the bistatic high resolution range profile( H RRP) is analyzed in this paper. The relationship between the bistatic H RRP and the monostatic H RRP of extended targets are investigated. It is demonstrated by simulations that the target length measured by the bistatic H RRP is more meaningful and accurate than that by the monostatic HRRP,though the monostatic H RRP has been well developed and widely used in target recognizing and classification. The estimation results of a cone shaped target are present and compared at the end of the paper. To assure the reliability of the simulation,the bistatic H RRP is obtained through the scattering field data calculated by a fullwave numerical method,FE-BI-MLFMA.展开更多
文摘针对宽带雷达舰船一维高分辨距离像(high range resolution profile,HRRP)特征提取问题,提出了一种船长特征提取算法。首先,基于雷达舰船跟踪信息估计出姿态角,并提取运动状态特征;其次,根据边界幅度异常变化判断目标是否存在截像;然后,根据相邻相关法对齐目标,并剔除异常的HRRP距离像,采用基于门限分割方法提取目标区域,按照一定的投影准则计算船长。所提出的方法测长精度高,通过实测数据验证表明,自动估计船长平均误差在10%以内,具有较强的工程应用价值。
基金Supported by the National Natural Science Fundation of China(61001192)
文摘The approach to estimate the length of extended targets by using the bistatic high resolution range profile( H RRP) is analyzed in this paper. The relationship between the bistatic H RRP and the monostatic H RRP of extended targets are investigated. It is demonstrated by simulations that the target length measured by the bistatic H RRP is more meaningful and accurate than that by the monostatic HRRP,though the monostatic H RRP has been well developed and widely used in target recognizing and classification. The estimation results of a cone shaped target are present and compared at the end of the paper. To assure the reliability of the simulation,the bistatic H RRP is obtained through the scattering field data calculated by a fullwave numerical method,FE-BI-MLFMA.