Wireless Indoor Positioning: Localization improvements with a Leaky Coaxial Cable Prototype

RF (Radio Frequency) Fingerprinting for indoor localization using wireless local area networks attracted significant attention throughout the last decade. A severe drawback of this approach however is the laborious effort to calibrate the radio map. Especially in case of environmental changes recalibration becomes necessary. The main focus of our research project WIPoS (Wireless Indoor Positioning System) is to solve this problem by appropriate RF engineering and optimized methods. This paper compares the performance of a standard leaky feeder cable to a new cable prototype with improved localization properties in a long hallway scenario. We can show that the localization accuracy of the new leaky feeder cable is similar to the performance of localization with standard omni antennas but it has an important advantage: the fingerprints are now more insensitive to environmental changes.