Optimal Beamforming Strategies At Mmwaves For 5G+ Networks
type: CreativeWork
description: Beyond fifth generation (5G+) communication aims to provide a 3-dimensional ubiquitous network to support high data rates caused by device proliferation. To aid 5G+ communications, three spectrum bands are being investigated: sub-6 GHz, millimeterwave (mmWave), and terahertz frequencies. Higher frequency range has the advantage of increased bandwidth availability, but it also has its own set of challenges such as increased signal attenuation, reduced cell range, increased computational and hardware complexities, and increased hardware cost. However, substantial research has been conducted to demonstrate the feasibility of communication at higher frequencies. This dissertation focuses specifically on mWave-enabled communications for serving users under different 2-dimensional as well as 3-dimensional network. The number of radio frequency (RF) chains that can be deployed at a device is a bottleneck in the mmWave range due to high hardware power consumption and hardware complexity. This, in turn, presents challenges in designing precoders and combiners, parameter estimation, signal processing, and user scheduling. Therefore, the objective of this dissertation is to investigate and design energy and spectrally efficient reduced complexity terrestrial and aerial mmWave communications frameworks/architectures with a limited number of RF chains. The first topic investigates sectored-cell framework for a 2-dimensional multi-user terrestrial mmWave communications when the user population exceeds the number of RF chains available at the gNodeB. This framework is analyzed in the context of a single RF chain that serves all sectors of a cell in a round-robin manner with equal sector sojourn time. The idea is to partition the cell into identical sectors and serve multiple users simultaneously that fall within each sector at a given epoch using a single steerable beam generated from a uniform linear antenna array coupled to an RF chain at the gNodeB. Consequently, a large number…
abstract: Beyond fifth generation (5G+) communication aims to provide a 3-dimensional ubiquitous network to support high data rates caused by device proliferation. To aid 5G+ communications, three spectrum bands are being investigated: sub-6 GHz, millimeterwave (mmWave), and terahertz frequencies. Higher frequency range has the advantage of increased bandwidth availability, but it also has its own set of challenges such as increased signal attenuation, reduced cell range, increased computational and hardware complexities, and increased hardware cost. However, substantial research has been conducted to demonstrate the feasibility of communication at higher frequencies. This dissertation focuses specifically on mWave-enabled communications for serving users under different 2-dimensional as well as 3-dimensional network. The number of radio frequency (RF) chains that can be deployed at a device is a bottleneck in the mmWave range due to high hardware power consumption and hardware complexity. This, in turn, presents challenges in designing precoders and combiners, parameter estimation, signal processing, and user scheduling. Therefore, the objective of this dissertation is to investigate and design energy and spectrally efficient reduced complexity terrestrial and aerial mmWave communications frameworks/architectures with a limited number of RF chains. The first topic investigates sectored-cell framework for a 2-dimensional multi-user terrestrial mmWave communications when the user population exceeds the number of RF chains available at the gNodeB. This framework is analyzed in the context of a single RF chain that serves all sectors of a cell in a round-robin manner with equal sector sojourn time. The idea is to partition the cell into identical sectors and serve multiple users simultaneously that fall within each sector at a given epoch using a single steerable beam generated from a uniform linear antenna array coupled to an RF chain at the gNodeB. Consequently, a large number…
author: Nancy Varshney
author: Swades De
language: eng
date published: 2023
date modified: 2026-07-24T03:50:41Z
provider: Politecnico di Torino
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Politecnico di Torino

PropertyValue
property ID: Handle
value: https://hdl.handle.net/11583/2989553