A GTD Scattering Center Model Parameter Estimation Method Based on CPSO

SHI Zhi-guang; ZHOU Jian-xiong; ZHAO Hong-zhong; FU Qiang

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A GTD Scattering Center Model Parameter Estimation Method Based on CPSO

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- A GTD Scattering Center Model Parameter Estimation Method Based on CPSO
- Acta Electronica Sinica Vol. 35, Issue 6, Pages: 1102-1107(2007)
- 作者机构：
  
  国防科技大学ATR实验室,湖南,长沙,410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published：2007
- 稿件说明：
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SHI Zhi-guang, ZHOU Jian-xiong, ZHAO Hong-zhong, et al. A GTD Scattering Center Model Parameter Estimation Method Based on CPSO[J]. Acta Electronica Sinica, 2007, 35(6): 1102-1107.
DOI：

SHI Zhi-guang, ZHOU Jian-xiong, ZHAO Hong-zhong, et al. A GTD Scattering Center Model Parameter Estimation Method Based on CPSO[J]. Acta Electronica Sinica, 2007, 35(6): 1102-1107. DOI：

摘要

针对雷达目标散射中心GTD(Geometric Theory of Diffraction)模型最大似然估计中存在的高维、非线性、混合参数估计问题

提出一种基于协同粒子群优化算法的参数估计方法.该方法能够同时估计得到散射中心的类型、幅度和位置参数

且对初始值不敏感

与基于RELAX的估计方法相比

不需要反复迭代估计

降低了计算复杂度.仿真实验结果表明

该算法能够较准确地估计得到GTD模型的散射中心参数.

Abstract

It is difficult to obtain the ML(Maximum Likelihood) parameter estimation of GTD (Geometric Theory of Diffraction) scattering center model because we must solve a high-dimensional

nonlinearity

mixed-parameter optimization problem.A CPSO (Cooperative Particle Swarm Optimization) based algorithm is developed for obtaining the ML estimation of GTD model parameter.This method can obtain the amplitude

type and position parameter simultaneously

and it is insensitive to the initialization value.Comparing with RELAX-based method

the CPSO-algorithm need not iterative estimate repeatedly

so reduces the complexity of computation.The simulation tests show that the CPSO-based method can get quite accurate estimation result of GTD model.

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