High-resolution hybrid localization in passive wireless sensor nets

Localization of passive wireless sensors poses new challenges due to the lack of processing power on sensor devices. In this paper, a derivation of the algorithms and an analysis of their performance are presented for localization in passive Wireless Sensor Networks (WSN). A wide-sense three-step least square (LS) location estimator for the proposed hybrid localization model combining benefits of three widely used methods has been developed. Numerical results demonstrate that the proposed hybrid localization can provide high resolution positioning of passive sensors with centimeter accuracy.