Inband and outband spectrum analysis of the BFDM and BFDM/OQAM signals with truncated Gaussian pulses

Pulse-shaping OFDM, or more generally BFDM and BFDM/OQAM, systems are originally proposed to combat intercarrier interference (ICI) caused by time-variance of the channel. The main property that makes these signals robust against ICI is that they allow to employ time-frequency well localized pulses, particularly Gaussian pulse which has the best time-frequency localization. However, this property also suppresses the outband or inband spectral leakage of the BFDM and BFDM/OQAM signal, making them attractive physical layer modulation scheme for cognitive radio. In this paper we analyze the power density spectra of the BFDM and BFDM/OQAM signals and numerically evaluate the inband and outband spectra for truncated Gaussian pulses.