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Table 4 Comparison system latency

From: Orthogonal beamforming using Gram-Schmidt orthogonalization for multi-user MIMO downlink system

  LF-OSDMA Extended
LF-OSDMA
Proposed
method
BS → User
(Step 1 or Step I)
δ BC δ BC δ BC
User → BS
(Step 2 or Step II)
δ all δ all δ select
BS → User
(Step 4 or Step IV)
  δ ad δ ad
User → BS
(Step 5 or Step V)
  δ all δ all