Table 1 The overhead comparison
From: R bits user selection switch feedback for zero forcing MU-MIMO based on low rate codebook
Scheme | Initialization | Quantized CSI | Additional | Totally feedback bits/period |
|---|---|---|---|---|
Conventional | 0 | B | 0 | B |
USS | 0 | B | (l-1)*r | B+(l-1)*r |
RVQ | N*M*16*2/q | B | 0 | N*M*32/q+B |