J4 ›› 2011, Vol. 38 ›› Issue (2): 99-104.doi: 10.3969/j.issn.1001-2400.2011.02.018

• 研究论文 • 上一篇    下一篇



  1. (西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071)
  • 收稿日期:2010-03-10 出版日期:2011-04-20 发布日期:2011-05-26
  • 通讯作者: 吴兆平
  • 作者简介:吴兆平(1984-),男,西安电子科技大学博士研究生,E-mail: zpwu@mail.xidian.edu.cn.
  • 基金资助:


Extended radar target tracking before detection using the modified particle filter

WU Zhaoping;ZHU Kairan;SU Tao;LU Jin   

  1. (National Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2010-03-10 Online:2011-04-20 Published:2011-05-26
  • Contact: WU Zhaoping



关键词: 检测前跟踪, 粒子滤波, 扩展目标, 似然比函数


The system dynamic model and measurement model in the particle filter(PF) are established in a sequence of radar range-Doppler measurements and a linear extended target model is proposed, which is more suitable for describing a maneuvering target than the conventional point target model. Furthermore, the likelihood ratio function of the new model is also derived. In addition, the conventional PF is improved here to reduce the number of particles. Due to the macthing between the proposed target model and the integration function of TBD algorithm over time, an improved probability of detection for the dim target is obtained. Simulation results demonstrate that the proposed method is capable of detecting and tracking a target with the SNR of 1dB stably.

Key words: track-before-detect, particle filter, extended target, likelihood ratio function