From: A low-complexity channel training method for efficient SVD beamforming over MIMO channels
Cost Item | Sums | Products | Divisions | Square roots | Sign Operations |
---|---|---|---|---|---|
\(C({\mathbf {P}}_j)\) | \(8(N-j)^2 + 2(N-j)\) | \(8(N-j)^2 + 6(N-j)\) | 1 | 1 | 1 |
\(C({\mathbf {Q}}_j)\) | \(8(N-j)^2 - 6(N-j)-4\) | \(8(N-j)^2 - 2(N-j)-6\) | 1 | 1 | 1 |
\(C_{\text {I}}\) | \(\frac{16}{3}N^3 - 2N^2 + \frac{8}{3}N -4\) | \(\frac{16}{3}N^3 + 2N^2 + \frac{2}{3}N +8\) | \(2N - 3\) | \(2N - 3\) | \(2N - 3\) |