雷达科学与技术2026，Vol.24Issue(2)：214-223,10.DOI:10.3969/j.issn.1672-2337.2026.02.012
单通道斜视聚束SAR舰船目标速度估计方法
Velocity Estimation Method of Ship Targets in Single-Channel Squinted Spotlight SAR
摘要
Abstract
For the single-channel squinted spotlight SAR imaging system,the ship target velocity and squint angle are highly coupled in the Doppler domain,which greatly increases the difficulty of ship velocity estimation.Based on this,a ship target velocity estimation method is proposed for single-channel squinted spotlight SAR.By constructing the parameter observation model of the Doppler center,frequency modulation rate and the long-axis direction of the ship in the focusing plane,the nonlinear coupling relationship between the squint angle and the heading and speed of the ship is explicitly characterized.In the process of inverting the ship velocity and squint angle parameters,a PSO-LM hybrid optimization framework is constructed to achieve efficient and high-precision solution of nonlinear equations,and multi-frame observation is further introduced to optimize the estimation accuracy.Theoretical analysis and simulation results show that the proposed method can achieve high-precision velocity estimation of ship targets in squinted spotlight SAR under single-channel conditions.关键词
斜视聚束SAR/单通道/舰船目标/速度估计Key words
squinted spotlight SAR/single-channel/ship target/velocity estimation分类
信息技术与安全科学引用本文复制引用
李根,孙翱,王伟..单通道斜视聚束SAR舰船目标速度估计方法[J].雷达科学与技术,2026,24(2):214-223,10.基金项目
国家自然科学基金(62271163) （62271163）
