Gezici, SinanSahinoglu Z.2016-02-082016-02-0820081089-7798http://hdl.handle.net/11693/23176In this letter, optimal ranging in a single-input multiple-output (SIMO) system is studied. The theoretical limits on the accuracy of time-of-arrival (TOA) (equivalently, range) estimation are calculated in terms of the Cramer-Rao lower bound (CRLB). Unlike the conventional phased array antenna structure, a more generic fading model is employed, which allows for the analysis of spatial diversity gains from the viewpoint of a ranging system. In addition to the optimal solution, a two-step suboptimal range estimator is proposed, and its performance is compared with the CRLBs.EnglishTime-of-arrival (TOA) estimationCramer-Rao lower bound (CRLB)Single-input multiple-output (SIMO) systems.Article10.1109/LCOMM.2008.0716911558-2558