Table 1 Complexity comparison
Channel estimation method | Multiplication | Addition |
|---|---|---|
FD-LS | O(M) | O(1) |
FD-MMSE | O(M3) | O(M3) |
FD-OLR-MMSE | O(r M2) | O(r M2) |
Channel estimation method | Multiplication | Addition |
|---|---|---|
FD-LS | O(M) | O(1) |
FD-MMSE | O(M3) | O(M3) |
FD-OLR-MMSE | O(r M2) | O(r M2) |