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

arXiv: https://arxiv.org/abs/2408.04505 · HTML: https://mlsanity.com/paper/2408.04505/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 8 Aug 2024.

## Built on by (most cited first, 1 of 1)

- [Precoder Design in Multi-User FDD Systems with VQ-VAE and GNN](https://mlsanity.com/paper/2510.09495/) (2025)

## Abstract (arXiv)

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). Extensive simulations with real-world measurement data show that our 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.