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Acta Armamentarii ›› 2014, Vol. 35 ›› Issue (7): 1032-1039.doi: 10.3969/j.issn.1000-1093.2014.07.015

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Research on Improved Divided Difference Particle Filter under Non-stationary Non-Gaussian Noise Background

WANG Hong-jian,XU Jin-long,LI Juan,ZHANG Ai-hua   

  1. (College of Automation,Harbin Engineering University, Harbin 150001, Heilongjiang, China)
  • Received:2013-08-06 Revised:2013-08-06 Online:2014-09-05
  • Contact: WANG Hong-jian E-mail:cctime99@163.com

Abstract: An improved divided difference particle filter (IDDPF) is proposed to improve the low accuracy of state estimation and divergent tend problem which may be caused by divided difference particle filter (DDPF) in the condition of the non-stationary non-Gaussian measurement noise (NSNGN). The IDDPF algorithm adopts Gaussian mixture density function to approximately estimate the measurement noise, instead of the Gaussian density function usually adopted in DDPF. The noise parameters are estimated by maximizing the log likelihood function of the measurement noise model. The model is then used to calculate the particle weight, which avoids the particle degeneracy problem. The IDDPF algorithm is tested by establishing bearing-only tracking of underwater target under the glint measurement noise background. The results of 50 Monte-Carlo simulation experiments show that the IDDPF algorithm has the advantages of fast tracking response, high estimated precision and robustness, etc. under NSNGN background.

Key words: control science and technology, non-stationary non-Gaussian noise, divided difference particle filter, Gaussian mixture density function, underwater target bearing-only tracking

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