Journal article
Tracking and localizing moving targets in the presence of phase measurement ambiguities
Y Cheng, X Wang, T Caelli, B Moran
IEEE Transactions on Signal Processing | Published : 2011
Abstract
When tracking a target using phase-only signal returns, range ambiguities due to the modulo 2π in measured signal phases are a major issue. Standard approaches to such problems would typically involve the use of Diophantine equations. In this paper, a simpler and robust solution is examined which uses look-up tables defined between the phase measurement and target location spaces to determine the phase measurement mapping. We show, first, that when the target motion is significant between data sampling intervals the location ambiguity can be resolved over time via known target-in-cluster tracking techniques. This method determines the optimal allocation of location with respect to phase meas..
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Funding Acknowledgements
Manuscript received November 17, 2010; revised March 10, 2011; accepted April 26, 2011. Date of publication May 10, 2011; date of current version July 13, 2011. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Ta-Hsin Li. This work was supported in part by the Melbourne Systems Laboratory, Department of Electrical and Electronic Engineering, the University of Melbourne and by the Queensland Research Laboratory, National ICT Australia (NICTA).