@article{asurveyonnongeostationarysatellite,
  title = {A Survey on Non-Geostationary Satellite Systems: The Communication Perspective},
  author = {Hayder Al-Hraishawi and Houcine Chougrani and Steven Kisseleff and Eva Lagunas and Symeon Chatzinotas},
  year = {2021},
  eprint = {2107.05312},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2107.05312v4},
}