From: Semiblind frequency-domain timing synchronization and channel estimation for OFDM systems
CH I (NLOS)
CH II (NLOS)
CH III (LOS)
σ 0 2
0.3432
0.1885
0.5211
σ 1 2
0.6211
0.3223
0.4338
σ 2 2
0.0329
0.48
0.0420
σ 3 2
0.0015
0.0079
0.0023