– This paper introduces two main contributions to the wireless sensor network domain. The first one consists of determining, using a semi-parametric model, the relationship between the distances separating sensors and the received signal strength indicators (RSSIs) of the signals exchanged by these sensors in a network. As for the second contribution, it consists in tracking a moving target in the network using the estimated RSSI/distance model. The target's position is estimated by combining acceleration information and the estimated distances separating the target from sensors having known positions, using either a Kalman or a particle filter.