Feedback Design with VQ-VAE for Robust Precoding in Multi-User FDD Systems
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917744267493376 |
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| author | Turan, Nurettin Baur, Michael Li, Jianqing Utschick, Wolfgang |
| author_facet | Turan, Nurettin Baur, Michael Li, Jianqing Utschick, Wolfgang |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_04505 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Feedback Design with VQ-VAE for Robust Precoding in Multi-User FDD Systems Turan, Nurettin Baur, Michael Li, Jianqing Utschick, Wolfgang Information Theory Signal Processing 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. |
| title | Feedback Design with VQ-VAE for Robust Precoding in Multi-User FDD Systems |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2408.04505 |