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Table 1 The complexity of the proposed algorithms

From: Optimal linear precoding for opportunistic spectrum sharing under arbitrary input distributions assumption

Case Iteration Computational
  complexity complexity
Spectrum efficiency O(2n 2 ln(L R/ϵ 1)) O(2s n 2 ln(L R/ϵ 1))
Energy efficiency O ( 2 n 2 ln ( LR / ε 1 ) × log 2 ( P t / ε 2 ) ) O ( 2 s n 2 ln ( LR / ε 1 ) × log 2 ( P t / ε 2 ) )