Table 2.

Complexity.

S.no	Algorithms	Complexity
1	MMSE	$O(N^3)$
2	Zero-Forcing Equalization	$O(N^2\times M)$
3	QRM-MLD	$O(2^{N+M})$
4	QRM-MLD-ZF	$O(2^{(}N+M))\times M^3$
5	QRM-MLD-MMSE	$O(N^2\times M)$