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Table 3 Comparison of the Feedback Bits

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

  LF-OSDMA Extended LF-OSDMA Proposed method
Step2 or Step II K(log2 N t M +QSINR) K(log2 N t M +QSINR) SQ CSI
Step 5 or Step V   K(log2 N t +QSINR) (K 1)(log2 N t +QSINR)