A Likelihood Ratio Test of Stealthy Target in Sky Wave Over-the-Horizon Radar Using Auxiliary Particle Filter

doi:10.7652/xjtuxb201308016

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A Likelihood Ratio Test of Stealthy Target in Sky Wave Over-the-Horizon Radar Using Auxiliary Particle Filter

更新时间：2025-05-08

- A Likelihood Ratio Test of Stealthy Target in Sky Wave Over-the-Horizon Radar Using Auxiliary Particle Filter
- Vol. 47, Issue 8, Pages: 93-97(2013)
- 作者机构：
  
  西安电子科技大学雷达信号处理国家重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201308016
  CLC： TN957.51
- Online First：10 August 2013，
  
  Published：2013
- 稿件说明：
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A Likelihood Ratio Test of Stealthy Target in Sky Wave Over-the-Horizon Radar Using Auxiliary Particle Filter[J]. 2013, 47(8): 93-97.
DOI：

A Likelihood Ratio Test of Stealthy Target in Sky Wave Over-the-Horizon Radar Using Auxiliary Particle Filter[J]. 2013, 47(8): 93-97. DOI： 10.7652/xjtuxb201308016.

摘要

针对天波超视距雷达(SKW-OTHR)对弱目标检测概率低的问题

提出基于辅助粒子滤波(APF)的似然比检测方法(APF-LK)。该方法先用状态空间模型描述SKW-OTHR系统

将天波超视距雷达目标检测问题建模为非线性非高斯系统的目标检测问题

然后利用APF输出的预测样本对应的未归一化权值近似非线性非高斯系统中的似然比

当似然比大于给定门限时认为目标存在

否则认为目标不存在

且当认为目标存在时

同时输出目标状态估计结果。仿真结果表明

与现有的基于粒子滤波的似然比检测方法相比

APF-LK方法对SKW-OTHR的弱目标检测能力提高了约0.5～1 dB。

Abstract

A likelihood ratio test using auxiliary particle filter(APF-LK)is proposed to improve the capability of detecting stealthy target in sky wave over-the-horizon radar(SKW-OTHR). The state-space model is used to describe the SKW-OTHR system

and the detection problem in SKW-OTHR is concluded as a problem of target detection in a nonlinear/non-Gaussian dynamic system. Then

the output of the APF

i.e.

the un-normalized weights according to the predicted particles

is used to obtain approximation to the likelihood ratio in the nonlinear/non-Gaussian system. A target is declared to exist and the sate estimation is outputted when the approximated likelihood ratio exceeds a given threshold. Otherwise

no target is declared.Simulation results and comparisons with the state of the arts show that the detection performance of the APF-LK method are improved by about 0.5～1 dB.

关键词

Keywords

references

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