Table 5 Computational Cost of GRA
From: A low-complexity channel training method for efficient SVD beamforming over MIMO channels
Cost Item | Sums | Products | Divisions | Square roots | Sign Operations |
|---|---|---|---|---|---|
\(C_N\) | \(\frac{16}{3}N^3 +10N^2 -\frac{28}{3}N +10\) | \(\frac{16}{3}N^3 +16N^2 -\frac{70}{3}N+4\) | \(4N^2 -2N-3\) | \(2N^2 -3\) | \(2N -3\) |