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A novel signal subspace approach for mobile positioning with time-of-arrival measurements

The problem of locating mobile terminals has recently received considerable attention particularly in the field of wireless communications. In this paper, a simple signal subspace based algorithm is devised for mobile positioning with the use of time-of-arrival (TOA) measurements received at three or more reference base stations. Computer simulations are included to contrast the estimator performance with Cramér-Rao lower bound and computationally attractive TOA-based localization methods in the literature.