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Table 1 Computational complexity

From: A new pilot assignment scheme for mitigating pilot contamination in uplink massive multi-input–multi-output (MIMO) systems

Algorithm

Order of complexity

TS-PA

\(\mathcal{O}(L{K}^{3})\)

GATS-PA

\(\mathcal{O}\left(PL{K}^{3}\right)+\mathcal{O}\left(PL{K}^{2}\right), T=K\)

EX-PA

\(\mathcal{O}({K!}^{L-1})\)