Suppressing the Out-of-band Power Radiation in Multi-carrier Systems: A Comparative Study
As of today, Orthogonal Frequency-Division Multiplexing (OFDM) has been the dominant technique in broadband transmission systems. However, for the application in cognitive radios, the side lobes of rectangularly pulsed OFDM signals must be well suppressed to satisfy the rigorous spectral masks. In this paper, Filter-Bank based Multi-Carrier (FBMC) transmission, which allows designing prototype filters for signal pulse shaping, is considered to be more effective. In this paper, different sidelobe suppression schemes for OFDM and pulse-shaped FBMC are comparatively investigated with respect to their out-of-band power radiation and their demand in computational complexity.