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OFDM/OQAM modulation for efficient dynamic spectrum access

Abstract : The cognitive radio idea consists in the exploitation of spectral resources that are unused by a licensed user within a telecommunication standard. After having detected these available frequency bands by some sensing technique, our work takes a stand on the spectrum access problem. This issue requires some constraints on the modulation that must be taken into account. The flexibility in frequency offered by a multicarrier modulation (MCM) then represents a strong advantage which, in addition, can be fully exploited by the OFDM/OQAM modulation. Indeed, the fact that well localised frequency pulse shapes can be employed makes this modulation attractive for an optimised dynamic spectrum insertion. OFDM/OQAM and OFDM-based solutions are finally tested considering two different transmission scenarios. In both scenarios, it is shown that, for OFDM/OQAM, the time-frequency localisation criterion leads to a short prototype filter, satisfying a good compromise in terms of complexity/performance and also leads at the same time to a better peak-to-average power ratio (PAPR) distribution when compared to an analogue windowed OFDM scheme.
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Submitted on : Friday, March 23, 2012 - 11:14:17 AM
Last modification on : Monday, January 24, 2022 - 2:07:46 PM



Alexandre Skrzypczack, Jacques Palicot, Pierre Siohan. OFDM/OQAM modulation for efficient dynamic spectrum access. International journal of communication networks and distributed systems, Inderscience Publishers, 2012, 8 (3-4), pp.247-266. ⟨10.1504/IJCNDS.2012.046360⟩. ⟨hal-00682021⟩



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