1Department of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland 2Orange Labs, France Telecom, 4 Rue du Clos Courtel, B.P. 91226, 35512 Cesson Sevigne Cedex, France 3Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112-9206, USA 4Centre Tecnologic de Telecommunication de Catalunya (CTTC), Parc Mediterrani de la Tecnologia, Avinguda del Canal Olimpic, Casstelldefels, 08860 Barcelona, Spain
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Renfors et al. (2010) studied this question.