ETSI reconfigurable radio systems: status and future directions on software defined radio and cognitive radio standards. - Markus Mueck; Antti Piipponen; Kari Kalliojärvi; George Dimitrakopoulos 001; Kostas Tsagkaris; Panagiotis Demestichas; Fernando Casadevall; Jordi Pérez-Romero; Oriol Sallent; Gianmarco Baldini; Stanislav A. Filin; Hiroshi Harada; et al. (IEEE Commun. Mag., 2010)