Angelosante, DanieleBiglieri, EzioLops, Marco2013-03-112013-03-112008Angelosante D, Biglieri E, Lops M. Sequential estimation of time-varying multipath channel for MIMO-OFDM systems. In: Proceedings of the 2008 IEEE International Symposium on Information Theory (ISIT '08); 2008 Jul 6-11; Toronto, Ontario, Canada. [New York]: IEEE; c2008. p.589-593. DOI 10.1109/ISIT.2008.45950540271-4655http://hdl.handle.net/10230/20477Comunicació presentada al IEEE International Symposium on Information Theory (ISIT '08), celebrat a Toronto (Ontario, Canadà) els dies 6, 7, 8, 9, 10 i 11 de juliol de 2008, organitzat per l'Institute of Electrical and Electronics Engineers (IEEE).In this paper, we introduce a pilot-aided multipath channel estimator for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems. Typical estimation algorithms assume the number of multipath components and delays to be known and constant, while their/namplitudes may vary in time. In this work, we focus on the more realistic assumption that also the number of channel taps is unknown and time-varying. The estimation problem arising from this assumption is solved using Random Set Theory (RST), which is a probability theory of finite sets. Due to the lack of a closed form of the optimal filter, a Rao-Blackwellized Particle Filter (RBPF) implementation of the channel estimator is derived. Simulation results demonstrate the estimator effectiveness.application/pdfeng© 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4595054Multiplexatge per divisió de freqüènciaSistemes MIMOConjunts, Teoria deinfo:eu-repo/semantics/conferenceObjecthttp://dx.doi.org/10.1109/ISIT.2008.4595054info:eu-repo/semantics/openAccess