Adaptive Step-size Iterative Equalization for Underwater Communication

Zi Ye (1) , Benoit Geller (1) , Tarak Arbi (1)

1 U2IS - Unité d'Informatique et d'Ingénierie des Systèmes

This paper presents a fully adaptive Minimum Mean Square Error (MMSE) iterative equalization with a joint phase estimation, using various adaptive step-sizes scheme. To meet the requirement of fast convergence and low MSE over time-varying channels, we propose an original self-optimized algorithm whose step-sizes are updated adaptively and assisted by soft-information provided by the channel decoder in an iterative manner. Simulation results show that our proposal achieves better performance over various multipath time-varying channels, compared to the conventional equalizer using a fixed step-size.

Mots clés: turbo equalization; phase estimation; adaptive algorithms

Domaines: Réseaux et télécommunications [cs.NI]

Zi Ye, Benoit Geller, Tarak Arbi. Adaptive Step-size Iterative Equalization for Underwater Communication. IEEE Oceans 21, Sep 2021, San Diego, United States. ⟨hal-03426901⟩