Node localization based on time reversal in wireless sensor network

Node localization in the wireless sensor network (WSN) proves to be a crucial technique. In some special occasions, the precisions of conventional techniques cannot meet our needs due to the multipath influence. In this paper, a novel node localization scheme based on time reversal(TR) has been proposed. We match the signal to the scattering environment thus it will enhance the accuracy of the position localization. We derive the location precision from basic EM theory and carry out some corresponding simulations. The conclusion is that this method can make the localization bias smaller than the working wavelength.