Beam selection for mm-wave massive MIMO systems using ACO & combined digital precoding under hybrid transceiver architecture

Abstract

We propose a Wiener filter (WF) and a combined zero forcing (ZF)/ WF precodings with ant colony optimization (ACO) algorithms as the digital precoder for millimeter wave multiple-input multiple-output (MIMO) systems. In the proposed schemes, beams are selected based on maximal magnitude (MM) criteria and the selection is optimized using ACO algorithm to achieve near optimal solution with highly reduced complexity. According to the simulation results, while ACO-WF scheme achieves higher sum rate in high inter-user interference (ISI) environments compared with conventional precoders, we confirm ACO-ZF/WF scheme can obtain a maximal sum rate in both low and high ISI environments.

Multi-antenna Arrays Based Massive-MIMO for B5G/6G: State-of-the-Art, Challenges and Future Research Directions

“…Experimental results showed that constructed algorithms can achieve a satisfactory sum-rate value and much better EE than traditional methods on a given model. A new joint beam selection process for analog precoding under a discrete lens array scheme has been presented in [45]. The authors have confirmed the excellence of the devised scheme by improving the system sum-rate, minimizing inter-user interference, and reducing computational complications.…”

“…The simulation test validated that the outlined framework achieved an acceptable sum-rate value and relatively higher EE compared to some available techniques. Similarly, while discussing the limitations of conventional hybrid precoding strategies, the authors [45] have proposed an energy-reliable switch and inverter (SI)-based hybrid precoding, and an adaptive cross-entropy (ACE) based hybrid precoding designs have been proposed. Experimental results showed that constructed algorithms can achieve a satisfactory sum-rate value and much better EE than traditional methods on a given model.…”

“…Achieved acceptable sum-rate value and relatively higher EE Dependence on one-bit PSs may limit performance in complex environments [45] Energy reliable SI, Proposed algorithms achieved satisfactory sum-rate value Energy-efficient designs may require complex hardware implementations…”

Threshold-Based User-Assisted Cooperative Relaying in Beamspace Massive MIMO NOMA Systems

“…The proposal of beamspace mMIMO systems using a lens antenna array, hybrid precoding, and beam selection have considerably reduced the number of RF blocks in mmWave mMIMO systems with no apparent performance loss [ 2 , 3 , 4 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ], but the maximum number of MUTs that can be supported at the same time and frequency resources cannot surpass the number of available RF blocks [ 2 , 3 , 4 , 7 , 9 , 13 , 16 ]. To overcome this limitation, NOMA has been incorporated into beamspace mMIMO systems to allow multiple MUTs to be served simultaneously in the same RF block [ 1 , 2 , 3 , 4 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 17 ].…”