Research Article
Macrocell Protection Interference Alignment in Two-Tier Downlink Heterogeneous Networks
Table 1
Computational complexity of MCP-IA and ILMA.
| Scheme | Step | Operation | FLOPs | MIMO |
| MCP-IA | Compute | SVD with only and [26, 27] | | 1024 | Compute | SVD with , , and [26, 27] | | 2624 | Compute | Matrix multiplication [26] | | 112 | SVD with only and | | 1024 | Compute | Matrix multiplication | | 96 | Matrix inversion [27, 28] | | 84 | Iteration | | | 1 | 1 | Total FLOPs | | | 4964 |
| ILMA | Compute | Matrix multiplication | | 32 | Compute | Eigenvalue decomposition [26, 27] | | 213 | Compute | Matrix multiplication | | 128 | Compute | Eigenvalue decomposition | | 1706 | Iteration | | | Convergence is required | 70 (average) | Total FLOPs | | 145530 |
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