We introduce DBS, a new technique for user selection in downlink multi-user communications with extra-large (XL) antenna arrays. DBS categorizes users according to their equivalent distance to the antenna array. Such categorization effectively accounts for inter-user interference while largely reducing the computational burden. Results show that (i) DBS achieves the same performance as the reference zero-forcing beamforming scheme with a lower complexity; (ii) a simplified version of DBS achieves a similar performance when realistic spherical-wavefront (SW) propagation features are considered; (iii) SW propagation brings additional degrees of freedom, which allows for increasing the number of served users.
@article{arxiv.2104.13690,
title = {Low-Complexity Distance-Based Scheduling for Multi-User XL-MIMO Systems},
author = {José P. González-Coma and F. Javier López-Martínez and Luis Castedo},
journal= {arXiv preprint arXiv:2104.13690},
year = {2024}
}
Comments
This work has been submitted to the IEEE for possible publication