Table 2 Computational complexity of QR/SVD-BD [22]
From: Lattice reduction aided with block diagonalization for multiuser MIMO systems
Steps | Operations | Flops | Case |
|---|---|---|---|
1 | H = QR | \( 16K\left({N}_T^2{N}_i+{N}_T{N}_i^2+1/3{N}_i^3\right) \) | 12544 |
2 | H eff  = HW | \( 8{N}_R{N}_T^2 \) | 1728 |
3 | \( {\mathbf{H}}_{i, eff}={\mathbf{U}}_i{\boldsymbol{\Lambda}}_i{\mathbf{V}}_i^H \) | \( 64\left(9/8{N}_i^3+{N}_T{N}_i^2+1/2{N}_i^2{N}_i\right) \) | 13248 |