Starting from the research significance of Ultra Wideband positioning, with the basic principles of Ultra Wideband ranging and location as the foundation, this paper introduces four common methods of Ultra Wideband positioning from the two aspects of the basic principle of the locating methods and positioning model. Using three typical decline phenomenon that exists in the transmission process of Ultra Wideband signal as the reference, this paper makes the comparison and analysis of various positioning methods from two aspects of Ultra Wideband technology characteristics and location accuracy.
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