Work

Feedback Design With VQ-VAE for Robust Precoding in Multi-User FDD Systems

Year: 2024

Type: article

Abstract: In this letter, we propose a vector quantized-variational autoencoder (VQ-VAE)-based feedback scheme for robust precoder design in multi-user frequency division duplex (FDD) systems. We demonstrate how the VQ-VAE can be tailored to specific propagation environments, focusing on systems with low pilot overhead, which is crucial in massive multiple-input multiple-output (MIMO) systems. Extensive simulations with real-world measurement data show that the proposed feedback scheme outperforms state-of-the-art autoencoder (AE)-based compression schemes and conventional Discrete Fourier transform (DFT) codebook-based schemes. These improvements enable the deployment of systems with fewer feedback bits or pilots.

Source: IEEE Wireless Communications Letters

DOI: 10.1109/lwc.2024.3503066

Authors: Nurettin Turan, Michael Baur, Jianqing Li, Wolfgang Utschick

Institution: Technical University of Munich

Language: English

Topic: Advanced MIMO Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,495

Funders: Bundesministerium für Bildung und Forschung, Ministry of Education and Research, Romania, Bayerische Staatsministerium für Wirtschaft, Landesentwicklung und Energie