  In this paper, the efficiency of various MIMO detectors was analyzed from the
perspective of highly correlated channels, where MIMO systems have a lack of
performance, besides in some cases an increasing complexity. Considering this
hard, but {a useful} scenario, various MIMO detection schemes {were accurately
evaluated concerning} complexity and bit error rate (BER) performance.
Specifically, successive interference cancellation (SIC), lattice reduction
(LR) and the combination of them were associated with conventional linear MIMO
detection techniques. {To demonstrate effectiveness}, a wide range of the
number of antennas and modulation formats have been considered aiming to verify
the potential of such MIMO detection techniques according to their
performance-complexity trade-off. We have also studied the correlation effect
when both transmit and receiver sides are equipped with uniform linear array
(ULA) and uniform planar array (UPA) antenna configurations. The performance of
different detectors is carefully compared when both antenna array
configurations are deployed {considering} a different number of antennas and
modulation order, especially {under} near-massive MIMO condition. We have also
discussed the relationship between the array factor (AF) and the BER
performance of both {antenna array} structures.
