AI-Empowered Hybrid MIMO Beamforming

03/03/2023
by   Nir Shlezinger, et al.
0

Hybrid multiple-input multiple-output (MIMO) is an attractive technology for realizing extreme massive MIMO systems envisioned for future wireless communications in a scalable and power-efficient manner. However, the fact that hybrid MIMO systems implement part of their beamforming in analog and part in digital makes the optimization of their beampattern notably more challenging compared with conventional fully digital MIMO. Consequently, recent years have witnessed a growing interest in using data-aided artificial intelligence (AI) tools for hybrid beamforming design. This article reviews candidate strategies to leverage data to improve real-time hybrid beamforming design. We discuss the architectural constraints and characterize the core challenges associated with hybrid beamforming optimization. We then present how these challenges are treated via conventional optimization, and identify different AI-aided design approaches. These can be roughly divided into purely data-driven deep learning models and different forms of deep unfolding techniques for combining AI with classical optimization.We provide a systematic comparative study between existing approaches including both numerical evaluations and qualitative measures. We conclude by presenting future research opportunities associated with the incorporation of AI in hybrid MIMO systems.

READ FULL TEXT

page 1

page 3

page 4

research
02/25/2019

Hybrid Beamforming: Where Should the Analog Power Amplifiers be Placed?

In this paper we study the spectral efficiency (SE) of a point-to-point ...
research
09/20/2023

Beamforming Design for RIS-Aided THz Wideband Communication Systems

Benefiting from tens of GHz of bandwidth, terahertz (THz) communications...
research
03/22/2023

Beam Squint Analysis and Mitigation via Hybrid Beamforming Design in THz Communications

We investigate the beam squint effect in uniform planar arrays (UPAs) an...
research
06/29/2020

A Comprehensive Performance Analysis for mm-Wave Massive MIMO Hybrid Beamforming under PA Nonlinearities

In this paper, we develop a framework to investigate the performances of...
research
11/02/2022

Distributed Massive MIMO for LEO Satellite Networks

The ultra-dense deployment of interconnected satellites will characteriz...
research
12/17/2018

Artificial Intelligence-aided OFDM Receiver: Design and Experimental Results

Orthogonal frequency division multiplexing (OFDM) is one of the key tech...
research
07/10/2023

Joint Communications and Sensing Hybrid Beamforming Design via Deep Unfolding

Joint communications and sensing (JCAS) is envisioned as a key feature i...

Please sign up or login with your details

Forgot password? Click here to reset