Instantaneous Length Estimation of Ships through Wideband Composite Bistatic Radar
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摘要: 舰船目标长度特征对舰船目标识别具有重要作用，该文提出一种基于宽带复合双基地雷达联合观测的舰船目标长度估计方法。该方法综合利用单/双基地雷达高分辨距离像(HRRPs)长度，结合双基地雷达-舰船之间的空间关系求解，实现了单次测量估计舰船目标的实际长度，并分析了各种误差因素和几何构型条件下的估计误差。典型场景动态仿真证明了所提方法的有效性，结果表明在高分辨距离像长度误差小于5%条件下，舰船目标长度估计误差小于5%，为舰船目标特征提取与识别提供了新思路。Abstract: The length feature plays an important role in the ship target identification. A new algorithm for ship length estimation based on the joint observation of wideband composite bistatic radar is presented, which utilize the mono-/bi-static High-Resolution Range Profiles (HRRPs) and the bistatic spatial geometry relation to estimate the actual length of the ship target with only one-time measurement. Then the estimation errors under different conditions and geometrical constructions are analyzed through Monte Carlo simulations. Finally, the proposed method is validated through typical scene simulation experiments. The results show that when the error of HRRP length is less than 5%, the estimation error of the actual ship length is less than 5%, which provides a new idea for feature extraction and identification of ship targets.
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Key words:
- Bistatic radar /
- Ship /
- High-Resolution Range Profiles (HRRPs) /
- Length estimation
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表 1 测量误差仿真参数设置
参数 取值 入射俯仰角(°) 45 接收俯仰角(°) 45 双基地角(°) 60 T/R站1维距离像长度(m) 70.7 R站1维距离像长度(m) 35.4 舰船目标长度(m) 100 入射俯仰角误差(°) 0～0.4 接收俯仰角误差 (°) 0～0.4 双基地角误差(°) 0～0.4 T/R站1维距离像长度误差 (m) 0～10 R站1维距离像长度误差(m) 0～10 
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表 2 观测模型仿真参数设置
参数 取值 入射俯仰角(°) 0～90 接收俯仰角(°) 0～90 入射方位角(°) –45 接收方位角(°) 45 舰船目标长度(m) 100 入射俯仰角误差(°) 0.2 接收俯仰角误差 (°) 0.2 双基地角误差(°) 0.2 T/R站1维距离像长度误差 (m) 1 R站1维距离像长度误差(m) 1
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表 4 仿真参数设置
参数 T/R站 R站 初始位置(km) $ \left[ {20\sqrt 3 , - 20,20} \right] $ $ \left[ {20\sqrt 3 ,20,20} \right] $ 结束位置(km) $ \left[5\sqrt{3},-5,20\right] $ $ \left[ {5\sqrt 3 ,5,20} \right] $ 速度(km/h) 900 900 时间(s) 120 120
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