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With the opening up of white spaces, efficient use of the fragmented spectrum -TV white space in particular -has become an extremely important focus of research. Apart from efficient spectrum usage, special care needs to be taken to maintain low out-of-band radiation to avoid harmful interference to incumbent services like TV signals and wireless microphones. For this reason, a flexible digital radio with multicarrier modulation scheme is the only solution. In this paper, we show thedoi:10.1109/dsd.2011.48 dblp:conf/dsd/DattaFKH11 fatcat:oyxjzjzbujbmbew4ixu6sb4lva