关键词: 信息处理技术, 目标尺寸, 非线性滤波, 目标跟踪

Abstract: Target tracking performance of surface particle target tracking system for position measurement of traditional two-dimensional coordinates is hardly improved on condition that no extra prior information is added. Based on engineering application, a ship was modeled as an elliptical target by considering the dimensions of the surface target, and the shape parameters of elliptical target were attained by a mature image processing technology. Meanwhile, an algorithm for estimating the motion parameters of elliptical target based on nonlinear measurements was presented; and the Cramer-Rao low bound (CRLB) of mo- tion parameter estimation was analyzed for the different parameters of target shape. Simulation analysis and preliminary results show that the elliptical target tracking is feasible, the elliptical target tracking sys- tem converges faster than the particle one, and the accuracy of motion parameter estimation of the ellipti- cal target system is higher than that of the particle system.

Key words: information processing, target size, nonlinear filtering, target tracking