Communication Dans Un Congrès Année : 2025

A novel GAMP-based receiver for nonlinearly distorded precoded OFDM signals

Résumé

We address the post-compensation of nonlinear distortion in precoded orthogonal frequency division multiplexing signals caused by power amplifier impairments. An iterative message-passing receiver is proposed, using generalized approximate message passing to perform OFDM demodulation and nonlinearity compensation, while deriving new messages towards the equalizer to establish a turbo-equalization scheme. Additionally, the complex integral required for GAMP is simplified, reducing it to a one-dimensional integral that can be computed numerically. The proposed receiver significantly outperforms previous GAMPbased distortion compensation techniques.

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Dates et versions

hal-05386561 , version 1 (28-11-2025)

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Hugo Parmentier, Frédéric Lehmann, Antoine Berthet. A novel GAMP-based receiver for nonlinearly distorded precoded OFDM signals. IEEE 101st Vehicular Technology Conference (VTC2025-Spring), Jun 2025, Oslo, Norway. ⟨10.1109/VTC2025-Spring65109.2025.11174777⟩. ⟨hal-05386561⟩
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