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Proceedings Paper

Laser Radar Tracking Theory
Author(s): Robert H. Enders; Jeffrey H. Shapiro
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Paper Abstract

Previous work in the theory of laser radar operation has addressed the problems of detection, range and Doppler estimation for multipixel speckle targets. In this paper, the theory of automatic tracking for such targets is developed. A track-while-image approach is adopted in which the laser radar produces a sequence of raster scans, called frames, across the region containing the target. From the present frame, an estimate of the current target location is generated and fed to a tracking filter, which both combines this information with the evolving sequence of location estimates, and determines the radar's line of sight for the next frame. Within this structure, various image-centroid, hot-spot, and template-matching trackers for multipixel speckle targets are described. These estimators all exhibit signal-dependent noise, i.e., their covariances consist of a constant term plus one or more terms that are outer-quadratic in target displacement from frame center. Nevertheless, they have been successfully incorporated into a generalization of the Kalman-linear-least-squares tracking-filter that can use pre-computed gains. Specific system examples are presented to illustrate the transient and steady-state behavior of several of these trackers.

Paper Details

Date Published: 18 February 1989
PDF: 16 pages
Proc. SPIE 0999, Laser Radar III, (18 February 1989); doi: 10.1117/12.960234
Show Author Affiliations
Robert H. Enders, Massachusetts Institute of Technology (United States)
Jeffrey H. Shapiro, Massachiisetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0999:
Laser Radar III
Richard J. Becherer, Editor(s)

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