期刊名称：Signal & Image Processing : An International Journal (SIPIJ)
印刷版ISSN：2229-3922
电子版ISSN：0976-710X
出版年度：2015
卷号：6
期号：3
页码：11
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：We consider the problem of localizing a target taking the help of a set of anchor beacon nodes. A smallnumber of beacon nodes are deployed at known locations in the area. The target can detect a beaconprovided it happens to lie within the beacon’s transmission range. Thus, the target obtains a measurementvector containing the readings of the beacons: ‘1’ corresponding to a beacon if it is able to detect thetarget, and ‘0’ if the beacon is not able to detect the target. The goal is twofold: to determine the locationof the target based on the binary measurement vector at the target; and to study the behaviour of thelocalization uncertainty as a function of the beacon transmission range (sensing radius) and the number ofbeacons deployed. Beacon transmission range means signal strength of the beacon to transmit and receivethe signals which is called as Received Signal Strength (RSS). To localize the target, we propose a gridmappingbased approach, where the readings corresponding to locations on a grid overlaid on the regionof interest are used to localize the target. To study the behaviour of the localization uncertainty as afunction of the sensing radius and number of beacons, extensive simulations and numerical experimentsare carried out. The results provide insights into the importance of optimally setting the sensing radius andthe improvement obtainable with increasing number of beacons.
关键词：Target Localization; uncertainty; Grid mapping based approach; Received Signal Strength (RSS)
