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Experimental study of DVB multipath behavior

Indoor positioning of first responders after disaster is of vital importance. Multipath mitigation is one of the main tasks for a wireless network based indoor positioning system. This paper presents an experimental study on behavior of Digital Video Broadcast (DVB) signal multipath in both outdoor and indoor environments. We find out that when test nodes are close enough, they share similar multipath and background. Relative range estimation among the nodes can greatly suppress large multipath errors. Time Difference of Arrival (TDOA) method may be used with Received Signal Strength (RSS) for improved for positioning estimation accuracy.