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A message-passing receiver for OFDM-based self-interference-limited networks

Abstract : In this paper, we develop a reliable bandwidth-efficient solution for coherent reception in networks prone to self-interference. Our primary focus is on OFDM-based amplify-and-forward two-way relaying, where each source node suffers from re-radiation of its own signal. An important issue is the superposition of the desired and interfering signals, which makes the channel estimation task difficult, especially for varying channel coefficients. To address this challenging problem, we introduce a factor-graph model of the estimation and detection problem at hand. Exploiting the conditional independence between unknown variables in the factor-graph, an efficient message-passing algorithm, that performs joint Bayesian channel estimation, self-interference mitigation and decoding, is derived. Simulation results show that the performance of the proposed method is close to that given by perfect knowledge of the channel for the target and interfering signals, even with limited training overhead
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https://hal.archives-ouvertes.fr/hal-01359872
Contributor : Médiathèque Télécom Sudparis & Institut Mines-Télécom Business School <>
Submitted on : Monday, September 5, 2016 - 10:10:10 AM
Last modification on : Monday, August 24, 2020 - 4:16:05 PM

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Frederic Lehmann. A message-passing receiver for OFDM-based self-interference-limited networks. IEEE Transactions on Vehicular Technology, Institute of Electrical and Electronics Engineers, 2016, 65 (8), pp.6136 - 6145. ⟨10.1109/TVT.2015.2479364⟩. ⟨hal-01359872⟩

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