Localization using multicarrier communication systems for Wireless Sensor Networks

A wireless sensor network (WSN) consists of spatially distributed autonomous tiny devices (nodes) using several sensors to cooperatively monitor physical or environmental conditions, such as temperature, lighting, sound, vibration, pressure, motion or pollutants, at different locations. Localization is very important for self-configuring WSNs and is essential to properly process the sensed data. In this paper, we discuss the special design considerations for WSN localization based on MultiCarrier (MC) communication systems. The Cramer-Rao Bound (CRB) is compared between the different ranging measurement techniques used in cooperative localization. We introduced Selective Duplication Technique (SDT) to optimize the MC system from WSN perspectives. SDT is considered as an extension to the sub-bands Duplication Technique (DT). The CRB for DT and SDT is examined to reflect the figure of merits achieved using the proposed SDT technique. Simulation results show significant performance improvements in localization accuracy using the proposed SDT technique.