OFDM receiver for fast time-varying channels using block-sparse Bayesian learning

Oana-Elena Barbu, Carles Navarro Manchón, Christian Rom, Tommaso Balercia, Bernard Henri Fleury

Research output: Contribution to journalLetterResearchpeer-review

11 Citations (Scopus)

Abstract

We propose an iterative algorithm for OFDM receivers operating over fast time-varying channels. The design relies on the assumptions that the channel response can be characterized by a few non-negligible separable multipath components, and the temporal variation of each component gain can be well characterized with a basis expansion model using a small number of terms. As a result, the channel estimation problem is posed as that of estimating a vector of complex coefficients that exhibits a block-sparse structure, which we solve with tools from block-sparse Bayesian learning. Using variational Bayesian inference, we embed the channel estimator in a receiver structure that performs iterative channel and noise precision estimation, intercarrier interference cancellation, detection and decoding. Simulation results illustrate the superior performance of the proposed receiver over state-of-art receivers.
Original languageEnglish
JournalI E E E Transactions on Vehicular Technology
Volume65
Issue number12
Pages (from-to)10053-10057
ISSN0018-9545
DOIs
Publication statusPublished - Dec 2016

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