Relative Localization of Sensors Based on their Responses to Moving Objects

Spatial relations between sensors placed for target detection can be inferred from the responses of individual sensors to target objects. Using this fact, we propose a sensor localization method to estimate the relative locations of sensors based on the responses of the sensors to moving objects. We let several objects with different sizes move along various paths one by one within the field of watch, where sensors are deployed. When two sensors concurrently detect each of the objects, we assume that the distance between the two sensors is equal to a given constant. Based on the distances between sensors estimated from sensors´ responses to the objects, the relative locations of sensors are estimated by a technique of the cooperative localization. Through several simulation experiments, we find that the proposed algorithm yields surprisingly accurate estimate of the relative locations of sensors.