Title :
Accuracy Comparison of LS and Squared-Range LS for Source Localization
Author :
Larsson, Erik G. ; Danev, Danyo
Author_Institution :
Dept. of Electr. Eng. (ISY), Linkoping Univ., Linkoping, Sweden
Abstract :
In this correspondence, we compute a closed-form expression for the asymptotic (large-sample) accuracy of the recently proposed squared-range least-squares (SR-LS) method for source localization [A. Beck, P. Stoica, and J. Li, ??Exact and approximate solutions of source localization problems,?? IEEE Trans. Signal Process., vol. 56, no. 5, pp. 1770-1778, May 2008]. We compare its accuracy to that of the classical least-squares (LS) method and show that LS and SR-LS perform differently in general. We identify geometries where the performances of the methods are identical but also geometries when the difference in performance is unbounded.
Keywords :
least squares approximations; SR-LS method; accuracy comparison; asymptotic accuracy; source localization; squared-range least-squares method; Least squares methods; position measurement; signal analysis;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2009.2032036