Frequency domain joint TOA and DOA estimation in IR-UWB
Rights accessRestricted access - publisher's policy
European Commisision's projectNEWCOM++ - NEtwork of Excellence in Wireless COMmunications++ (NEWCOM++) (EC-FP7-216715)
This paper addresses the problem of TOA and DOA estimation in IR-UWB systems. It considers a frequency domain approach for joint high resolution estimation of Time Of Arrival (TOA) and Direction Of Arrival (DOA). The proposed scheme performs timing acquisition following a two step approach: a first stage where coarse symbol timing is achieved by means of chip energy estimation and a minimum distance criterion based on the time-hopping sequence knowledge, followed by a reduced complexity high resolution TOA estimator that provides fine timing acquisition. The proposed algorithm can resolve time synchronization blindly, without the need for channel estimation and can operate on a single symbol basis. DOA estimation is then obtained from TOA estimates at each array element applying a linear estimator. The joint estimation of TOA and DOA provides robustness and potentially allows positioning with a single reference node. Furthermore, the paper derives the Cramer-Rao Lower Bound from a frequency domain signal model for a multipath channel where no assumptions are made with respect to the paths, which results in a compact closed form.
CitationNavarro, M.; Najar, M. Frequency domain joint TOA and DOA estimation in IR-UWB. "IEEE transactions on wireless communications", Octubre 2011, vol. 10, núm. 10, p. 3174-3184.
|Frequency Domain Joint.pdf||398,8Kb||Restricted access|