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Joint Quantized Precoding and Bit Allocation for Fronthaul-Constrained Cell-Free Massive MIMO — arXiv:2609.26149

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.26149
License (as archived): CC0-1.0
Archived: 2026-10-08T16:33:27.096Z
SHA-256 of the archived text: 97a9b17f98624ea2689c331f9e299de341152581fa05145511995f2833d7bb76
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How to cite

Joint Quantized Precoding and Bit Allocation for Fronthaul-Constrained Cell-Free Massive MIMO — arXiv:2609.26149 — arXiv (en), https://arxiv.org/abs/2609.26149 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_efa67e471671 (Metraipolis archive dc_efa67e471671, sha256 97a9b17f98624ea2689c331f9e299de341152581fa05145511995f2833d7bb76)

BibTeX

@misc{dcefa67e471671,
  title = {Joint Quantized Precoding and Bit Allocation for Fronthaul-Constrained Cell-Free Massive MIMO — arXiv:2609.26149},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.26149},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_efa67e471671; sha256 97a9b17f98624ea2689c331f9e299de341152581fa05145511995f2833d7bb76},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.26149. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We study quantization-aware precoding for the downlink of cell-free massive MIMO systems with limited-resolution fronthaul. In such systems, the centrally designed precoder must be quantized before being conveyed to distributed access points (APs), creating a strong coupling between precoder design and fronthaul compression. To capture this effect, we develop an end-to-end signal model based on Bussgang decomposition, where the quantization distortion depends explicitly on the precoder coefficients. Building on this model, we formulate a joint precoding and bit allocation problem under per-AP power constraints and a total fronthaul bit budget. We propose an efficient block coordinate descent algorithm that iteratively updates the precoder, receive scaling, and distortion levels. Numerical results demonstrate that the proposed method significantly outperforms uniform bit allocation and quantization-unaware precoding schemes, particularly in fronthaul-limited regimes.

Tema degli esploratori: matematica e informatica teorica (retro-catalogo arXiv: annunci del 2026-09-23 in math.IT).
Categorie arXiv: Information Theory (cs.IT) ; Signal Processing (eess.SP).
Pagina del lavoro: https://arxiv.org/abs/2609.26149 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-08T15:53:59.913Z dalla pagina https://arxiv.org/catchup/math.IT/2026-09-23?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).