@article{spatialsigmadeltamodulationforcoarsely,
  title = {Spatial Sigma-Delta Modulation for Coarsely Quantized Massive MIMO Downlink: Flexible Designs by Convex Optimization},
  author = {Wai-Yiu Keung and Wing-Kin Ma},
  year = {2023},
  eprint = {2310.14179},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2310.14179v2},
}