A complexity-performance-balanced multiuser detector based on artificial fish swarm algorithm for DS-UWB systems in the AWGN and multipath environments

EURASIP Journal on Advances in Signal Processing

Table 2 The computational complexity comparison

MUD algorithms	Computational complexity
MMSE	K (From Equation 13)
DEC	K (From Equation 14)
SIC	K (From Equation 15)
AFSA-MUD	$K + (K + 1) \{(\begin{array}{l} K \\ 0 \end{array}) + (\begin{array}{l} K \\ 1 \end{array}) + \dots + (\begin{array}{l} K \\ L_{i} \end{array})\}$ (From Appendix)
OMD	2^K(K + 1) (From Equation 10)