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Analysis of a FTN Multicarrier System: Interference Mitigation Based on Tight Gabor Frames

Abstract : Cognitive radio applications require flexible waveforms to overcome challenges such as opportunistic spectrum allocation. In this context, filtered multicarrier modulations are particularly justified to fit time-frequency characteristics of the channel. In our theoretical framework, a multicarrier signal is described as a Gabor family the coeÿcients of which are the symbols to be transmitted and the generators are the time-frequency shifted pulse shapes to be used. In this article, we consider non-rectangular pulse shapes and an increased signaling density such that inter-pulse interference is unavoidable. Such an interference is minimized when using a tight Gabor frame. We show that, in this case, it can be approximated as an additive Gaussian noise, allowing us to compute theoretical bit-error-probability. This result allows to predict the convergence of a coded system using iterative decoding. We also study the relevancy of such a system in an interference cancellation context.
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Contributor : Cyrille Siclet Connect in order to contact the contributor
Submitted on : Wednesday, February 28, 2018 - 3:49:14 PM
Last modification on : Wednesday, November 3, 2021 - 5:09:30 AM

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Alexandre Marquet, Cyrille Siclet, Damien Roque, Pierre Siohan. Analysis of a FTN Multicarrier System: Interference Mitigation Based on Tight Gabor Frames. EAI Endorsed Transactions on Cognitive Communications, EAI Publications, 2017, 3 (10), pp.152191. ⟨10.4108/eai.23-2-2017.152191⟩. ⟨hal-01719886⟩



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