An efficient localization algorithm is proposed by utilizing the timedifference of arrival (TDOA) without synchronization between base stations. Generally, aTDOA-based localization algorithm requires synchronization between base stations in order toimprove the accuracy of localization. Hence, correlations using wideband signals or wire connectionsbetween base stations have been used to synchronize the base stations; however, these approachesresult in additional operating costs. Thus, the proposed algorithm does not require synchronizationbetween base stations. The TDOA equations are derived by continuously varying the locations of thesource and the location of a base station. The number of packets necessary for localization is alsoreduced. The localization performance of the proposed algorithm is verified with Monte-Carlosimulations.
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