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Table 1 Complexity in numbers of operations for MMSE and MMSE-SA.

From: Performance-Driven Symbol Mapping for Downlink and Point-to-Point MIMO Systems

MMSE No. of operations MMSE-SA No. of operations
(1) construct (1) construct
(2) invert (2) invert
(3) multiply with (3) multiply with
(4) multiply with (4) multiply with
(5) calculate scaling factor (5) calculate scaling factor
    (6) choose optimum
Total Total