H. Al-Hraishawi, H. Chougrani, S. Kisseleff, E. Lagunas, and S. Chatzinotas, "A survey on non-geostationary satellite systems: The communication perspective, " IEEE Commun. Surveys Tuts., Aug. 2022.
F. Rinaldi, H.-L. Maattanen, J. Torsner, S. Pizzi, S. Andreev, A. Iera, Y. Koucheryavy, and G. Araniti, "Non-terrestrial networks in 5G & beyond: A survey, " IEEE Access, vol. 8, pp. 165 178-165 200, Sep. 2020.
X. Lin, S. Rommer, S. Euler, E. A. Yavuz, and R. S. Karlsson, "5G from space: An overview of 3GPP non-terrestrial networks, " IEEE Commun. Stand. Mag., Oct. 2021.
H. Al-Hraishawi, S. Chatzinotas, and B. Ottersten, "Broadband nongeostationary satellite communication systems: Research challenges and key opportunities, " in IEEE Int. Commun. Conf. Workshops (ICC Workshops), Jun. 2021, pp. 1-6.
M. Y. Abdelsadek, H. Yanikomeroglu, and G. K. Kurt, "Future ultradense LEO satellite networks: A cell-free massive MIMO approach, " in IEEE Int. Commun. Conf. (ICC Workshops), Jun. 2021, pp. 1-6.
Ö. T. Demir, E. Bjö rnson, L. Sanguinetti et al., "Foundations of usercentric cell-free massive MIMO, " Foundations and Trends® in Signal Processing, vol. 14, no. 3-4, pp. 162-472, Jan. 2021.
M. Matthaiou, O. Yurduseven, H. Q. Ngo, D. Morales-Jimenez, S. L. Cotton, and V. F. Fusco, "The road to 6G: Ten physical layer challenges for communications engineers, " IEEE Commun. Mag., vol. 59, no. 1, pp. 64-69, Jan. 2021.
L. You, K.-X. Li, J. Wang, X. Gao, X.-G. Xia, and B. Ottersten, "Massive MIMO transmission for LEO satellite communications, " IEEE J. Sel. Areas Commun., vol. 38, no. 8, pp. 1851-1865, Jun. 2020.
L. Feng, Y. Liu, L. Wu, Z. Zhang, and J. Dang, "A satellite handover strategy based on MIMO technology in LEO satellite networks, " IEEE Commun. Lett., vol. 24, no. 7, pp. 1505-1509, Apr. 2020.
H. Cheporniuk, R. T. Schwarz, T. Delamotte, and A. Knopp, "MIMO throughput performance analysis in LEO communication scenario, " in IEEE Veh. Technol. Conf. (VTC2021-Fall). IEEE, 2021, pp. 01-06.
D. Goto, H. Shibayama, F. Yamashita, and T. Yamazato, "LEO-MIMO satellite systems for high capacity transmission, " in IEEE Globel Comnun. Conf. (Globecom), Dec. 2018, pp. 1-6.
H. Al-Hraishawi, E. Lagunas, and S. Chatzinotas, "Traffic simulator for multibeam satellite communication systems, " in 10th Advanced Satellite Multimedia Syst. Conf. and the 16th Signal Process. Space Commun. Workshop (ASMS/SPSC), Sep. 2020, pp. 1-8.
M. Kim, S. Kasi, P. A. Lott, D. Venturelli, J. Kaewell, and K. Jamieson, "Heuristic quantum optimization for 6G wireless communications, " IEEE Netw., vol. 35, no. 4, pp. 8-15, Aug. 2021.
E. Farhi, J. Goldstone, and S. Gutmann, "A quantum approximate optimization algorithm, " arXiv preprint arxiv: 1411. 4028, Nov. 2014.
L. Zhou, S.-T. Wang, S. Choi, H. Pichler, and M. D. Lukin, "Quantum approximate optimization algorithm: Performance, mechanism, and implementation on near-term devices, " Phys. Rev. X, vol. 10, p. 021067, Jun. 2020.
S. Kisseleff, E. Lagunas, J. Krivochiza, J. Querol, N. Maturo, L. M. Marrero, J. Merlano-Duncan, and S. Chatzinotas, "Centralized gateway concept for precoded multi-beam GEO satellite networks, " in IEEE 94th Veh. Technol. Conf. (VTC2021-Fall), 2021, pp. 1-6.
3rd Generation Partnership Project (3GPP), "Technical specification group radio access network; study on new radio (NR) to support non terrestrial networks (Release 15), " 3GPP, Tech. Rep. 38. 811, Sep. 2020.
V. M. Baeza, E. Lagunas, H. Al-Hraishawi, and S. Chatzinotas, "An overview of channel models for NGSO satellites, " in IEEE 96th Veh. Technol. Conf. (VTC2022-Fall), London, UK, Sep. 2022, pp. 1-6.
A. Adhikary, J. Nam, J.-Y. Ahn, and G. Caire, "Joint spatial division and multiplexing-the large-scale array regime, " IEEE Trans. Inf. Theory, vol. 59, no. 10, pp. 6441-6463, Oct. 2013.
B. Clerckx and C. Oestges, MIMO wireless networks: channels, techniques and standards for multi-antenna, multi-user and multi-cell systems. Oxford, U. K.: Academic Press, 2013.
B. S. Mysore, E. Lagunas, S. Chatzinotas, and B. Ottersten, "Precoding for satellite communications: Why, how and what next?" IEEE Commun. Lett., vol. 25, no. 8, pp. 2453-2457, Feb. 2021.
S. Kim, J. W. Choi, and B. Shim, "Downlink pilot precoding and compressed channel feedback for FDD-based cell-free systems, " IEEE Trans. Wireless Commun., vol. 19, no. 6, pp. 3658-3672, Jun. 2020.
R. M. Karp, Reducibility Among Combinatorial Problems. Boston, MA: Springer US, 1972, pp. 85-103.
A. Lucas, "Ising formulations of many NP problems, " Front. Phys., vol. 2, Feb. 2014.
V. Akshay, D. Rabinovich, E. Campos, and J. Biamonte, "Parameter concentrations in quantum approximate optimization, " Phys. Rev. A, vol. 104, p. L010401, Jul. 2021.
C. Moussa, H. Wang, T. Bäck, and V. Dunjko, "Unsupervised strategies for identifying optimal parameters in quantum approximate optimization algorithm, " EPJ Quantum Technol., vol. 9, no. 1, p. 11, May 2022.
M. J. D. Powell, "An efficient method for finding the minimum of a function of several variables without calculating derivatives, " Comput. J., vol. 7, no. 2, pp. 155-162, 01 1964.
J. Preskill, "Quantum Computing in the NISQ era and beyond, " Quantum, vol. 2, p. 79, Aug. 2018.
J. Johansson, P. Nation, and F. Nori, "QuTiP 2: A Python framework for the dynamics of open quantum systems, " Comput. Phys. Commun., vol. 184, no. 4, pp. 1234-1240, Apr. 2013.