Table 2 Computation complexity comparison of binary/ quadriphase correlators
From: Joint timing synchronization and channel estimation based on ZCZ sequence set in SC-MIMO-FDE system
Correlator | Complex multiplication | Complex addition |
|---|---|---|
Direct | 0 | \(ML \times \left (L-1\right) \) |
Radix-2 FFT | \(\frac {1}{2}\left (M+1\right)L \log _{2}L+ML\) | \(\left (M+1\right)L \times \log _{2}{L}\) |
Efficient | 0 | \(ML \left (\frac {L_{a}-1}{M}+N\left (M-1\right)\right) \) |
[13] | \(ML \times \left (L/M\right)\) | \(ML \times \left (L-1\right)/M \) |