From: Joint timing synchronization and channel estimation based on ZCZ sequence set in SC-MIMO-FDE system

Correlator | Complex multiplication | Complex addition |
---|---|---|

Direct |
M
L×L
| \(ML \times \left (L-1\right) \) |

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 | \(ML \left (L_{a}/M+NM\right) \) | \(ML \left (\frac {L_{a}-1}{M}+N\left (M-1\right)\right) \) |

[13] | \(ML \times \left (L/M\right)\) | \(ML \times \left (L-1\right)/M \) |