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Proceedings Paper

Comparison of state- and information-based sensor fusion
Author(s): Arthur G. O. Mutambara
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Paper Abstract

In this paper, state and information space estimation methods used in both linear and nonlinear systems are compared. General recursive estimation and in particular the Kalman filter is discussed and a Bayesian approach to probabilistic information fusion is outlined. The notion and measures of information are defined. This leads to the derivation of the algebraic equivalent of the Kalman filter, the linear information filter. The characteristics of this filter and the advantages of information space estimation are discussed. Examples are then implemented in software to illustrate the algebraic equivalence of the Kalman and Information filters. The benefits of information space are also explored in these case studies. State estimation for systems with nonlinearities is considered and the extended Kalman filter treated. Linear information space is then extended to nonlinear information space by deriving the extended information filter. This establishes all the necessary mathematical tools required for exhaustive information space estimation. The advantages of the extended information filter over the extended Kalman filter are presented and demonstrated. This extended information filter constitute an original and significant contribution to estimation theory made in this paper. Examples of systems involving both nonlinear state evolution and nonlinear observations are simulated. Thus, the algebraic equivalence of the two filters is illustrated and the benefits of nonlinear information space manifested.

Paper Details

Date Published: 9 October 1998
PDF: 9 pages
Proc. SPIE 3523, Sensor Fusion and Decentralized Control in Robotic Systems, (9 October 1998); doi: 10.1117/12.327016
Show Author Affiliations
Arthur G. O. Mutambara, Florida A&M Univ.-Florida State Univ. College of Engineering (United States)


Published in SPIE Proceedings Vol. 3523:
Sensor Fusion and Decentralized Control in Robotic Systems
Paul S. Schenker; Gerard T. McKee, Editor(s)

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