Efficient Detection in Uniform Linear and Planar Arrays MIMO Systems under Spatial Correlated Channels

TL;DR

This paper evaluates various MIMO detection schemes in highly correlated channels with uniform linear and planar arrays, analyzing their performance and complexity trade-offs in near-massive MIMO scenarios.

Contribution

It provides a comprehensive comparison of detection techniques considering array configurations, correlation effects, and modulation formats, highlighting their performance in challenging correlated MIMO channels.

Findings

Successive interference cancellation and lattice reduction improve detection performance.

Array configuration impacts BER performance and array factor relationship.

Detection schemes exhibit different complexity-performance trade-offs in correlated MIMO channels.

Abstract

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.