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Journal Articles IEEE Communications Letters Year : 2023

Practical Frequency-Domain Decision Feedback Equalization based on Expectation Propagation

Abstract

This work tackles the problem of implementing frequency-domain (FD) Decision Feedback Equalization (DFE) algorithms derived from the Expectation Propagation (EP) framework under strict computational complexity and latency constraints. The EP soft-symbol feedback reliability estimation can be advantageously replaced by an offline pre-calculated function, which not only lowers the complexity of the EP-based FD DFE but also increases its robustness under challenging channels. Secondly, a substantial complexity reduction is obtained by approximating the input-output transfer functions of the EP soft mapper with linear piece-wise functions. The overall performance of the proposed practical receiver has a negligible loss with respect to the original EP-based DFE proposal.
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Dates and versions

hal-04181067 , version 1 (14-08-2023)

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Antonio Maria Cipriano, Serdar Şahin, Charly Poulliat. Practical Frequency-Domain Decision Feedback Equalization based on Expectation Propagation. IEEE Communications Letters, 2023, 27 (10), pp.1-1. ⟨10.1109/LCOMM.2023.3303676⟩. ⟨hal-04181067⟩
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