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Table 2 Average number of column exchanges ( c ̄ ) within each algorithm

From: Low complexity lattice reduction scheme for STBC two-user uplink MIMO systems

- LLL-LR SLR I-SLR
  w/o IS w/IS   
c ̄ 7.03 3.07 0.70 0.73
%saved w/o IS 56.3% 90.0% 89.6%
  w/IS - 77.2% 76.2%
  1. *w/o IS: without initial sorting, *w/IS: with initial sorting