Enabling 6G Performance in the Upper Mid-Band Through Gigantic MIMO
<|reference_start|>Enabling 6G Performance in the Upper Mid-Band Through Gigantic MIMO: The initial 6G networks will likely operate in the upper mid-band (7-24 GHz), which has decent propagation conditions but underwhelming new spectrum availability. In this paper, we explore whether we can anyway reach the ambitious 6G performance goals by evolving the multiple-input multiple-output (MIMO) technology from being massive to gigantic. We describe how many antennas are needed and can realistically be deployed, and what the peak user rate and degrees-of-freedom (DOF) can become. We further suggest a new deployment strategy that enables the utilization of radiative near-field effects in these bands for precise beamfocusing, localization, and sensing from a single base station site. We also identify five open research challenges that must be overcome to efficiently use gigantic MIMO dimensions in 6G from hardware, cost, and algorithmic perspectives.<|reference_end|>
@article{björnson2024enabling,
    title={Enabling 6G Performance in the Upper Mid-Band by Transitioning From
  Massive to Gigantic MIMO},
    author={Emil Bj"ornson, Ferdi Kara, Nikolaos Kolomvakis, Alva Kosasih, Parisa
  Ramezani, Murat Babek Salman},
    journal={arXiv preprint arXiv:2407.05630},
    year={2024},
    archivePrefix={arXiv},
    eprint={2407.05630},
    primaryClass={cs.IT eess.SP math.IT}
}