Ant Colony-based Optimization algorithm to overcome the pilot contamination issue within multi-cell Massive MIMO systemsAbdelfettah Belhabib, Jamal Amadid, Asma Khabba and Abdelouhab ZeroualE3S Web Conf., 351 (2022) 01078DOI: https://doi.org/10.1051/e3sconf/202235101078