From: Iterative receivers with channel estimation for multi-user MIMO-OFDM: complexity and performance
Algorithm | Total no. of complex mult.* | Mult. per bit |
---|---|---|
Channel estimators | Â | Â |
SAGE ML | 2MNS +2MNL +IN | 24 |
Joint MMSE | MS(3 + K) + KMI(1 + I) + K2I3 + N(MS + 2MI + KI2) | 465 |
Krylov MMSE | 3MS + MSN + 2IMN + CAx(S k + 1) + IN(5S k + 2) + 3NS k /K | 145 |
with | CAx = 3MSN+ IN(M +1) | Â |
Multi-user detection | Â | Â |
PIC-MF | 2MSN+4MS+MNK | 13 |
PIC-MMSE | 4SM + 3SMN + SMNK + SMK3 + MNK | 97 |
MAP | SMN22K/K | 256 |
SISO decoder | Â | Â |
MAP** | (42M(S - Sp))/3 | 56 |