Asynchronous Differential TDOA for Sensor Self-Localization

Most methods for sensor self-localization require either synchronization or round trip communications among the networked sensors. A differential time-difference-of-arrival (dTDOA) method is proposed in this paper that does not require such time synchronization nor round trip communications, thus greatly reduces demand on sensor communications resources and makes implementation much easier. Theoretical results are presented for the principle of the new method and simulations are also given that confirm the effectiveness of the proposed method.