Tracking Filter Engineering – The GaussNewton and Polynomial Filters

Author: Norman Morrison

Year: 2012

Format: Hardback

Product Code: PBRA0230

ISBN: 9781849195546

Pagination: 320 pp.

Stock Status: In stock
£78.65 Member price
£121.00 Full price
Description
For almost 50 years the Kalman filter has been the accepted approach to tracking filter engineering. At the start of the Satellite Age in 1958, GaussNewton tracking filters were tried but had to be ruled out for realtime use because of the speed limitations of existing computers. In their place two new algorithms were devised, first the Swerling filter and then the Kalman filter, both of which could be run in real time on the machines of that era. It was nevertheless observed that GaussNewton possessed some superior properties, particularly with regard to stability.
Computer speed has now vastly increased and so GaussNewton need no longer be ruled out. The almost one hour that it took to execute GaussNewton in 1958 is now down to a few tens of milliseconds on readily available machines, and could soon be down to microseconds if computer technology continues to progress as it has done in recent years.
It is on this basis that Morrison presents his approach. The book provides a complete theoretical background, and then discusses in detail the GaussNewton filters. Of particular interest is a new approach to the tracking of manoeuvring targets that is made possible by these filters. The book also covers the expanding and fading memory polynomial filters based on the Legendre and Laguerre orthogonal polynomials, and how these can be used in conjunction with GaussNewton.
Fourteen carefully constructed computer programs cover the theoretical background, and also demonstrate the power of the GaussNewton and polynomial filters. Two of these programs include Kalman, Swerling and GaussNewton filters, all three processing identical data. These demonstrate Kalman and Swerling instability to which GaussNewton is immune, and also the fact that if an attempt is made to forestall Kalman and Swerling instability by the use of a Q matrix, then they are no longer CramérRao consistent and become noticeably less accurate than the always CramérRao consistent GaussNewton filters.
Book readership
This book will be of interest to filter engineering practitioners, to graduatelevel newcomers wishing to learn about GaussNewton and polynomial filters and to university lecturers who might wish to include material on the GaussNewton and polynomial filters in graduatelevel courses on tracking filter engineering.
Book contents
Models, differential equations and transition matrices
Observation schemes
Random vectors and covariance matrices – theory
Random vectors and covariance matrices in filter engineering
Bias errors
Three tests for ECM consistency
Minimum variance and the Gauss–Aitken filters
Minimum variance and the Gauss–Newton filters
The master control algorithms and goodnessoffit
The Kalman and Swerling filters
Polynomial filtering – 1
Polynomial filtering – 2