Energy Efficiency vs Spectral Efficiency Tradeoff in MIMO Systems with Hardware Non-Linearities

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Abstract

Massive multiple-input multiple-output (MIMO) technology is one of the pivotal enablers for future wireless communication systems that offer high spectral efficiency (SE) and reliability due to its increased array and diversity gains. However, energy efficiency (EE) and sustainability of the system is one of the crucial parameters for next-generation wireless networks, necessitating careful consideration of the SE vs. EE tradeoff. Accurate evaluation of a system's EE requires a comprehensive end-to-end (E2E) model that accounts for practical hardware impairments, such as finite-resolution analog-to-digital converters (ADCs) / digital-to-analog converters (DACs) and non-linear power amplifiers (PAs), which degrade system performance. In this work, we develop an E2E model for MIMOorthogonal frequency division multiplexing (OFDM) system with hybrid beamforming considering both the partially connected (PC) and fully connected (FC) architectures. The behavior of finite-resolution DACs and ADCs is characterized as additive quantization noise model (AQNM), while the behavior of PAs is characterized through the Bussgang decomposition. Our analysis offers valuable insights into the influence of DAC/ADC resolution and PA input back-off (IBO) on the EE of the system, highlighting key trade-offs and performance considerations for system design.

Details

Original languageEnglish
Title of host publication2025 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)
PublisherIEEE Canada
Pages649-654
Number of pages6
ISBN (electronic)979-8-3503-9180-0
ISBN (print)979-8-3503-9181-7
Publication statusPublished - 6 Jun 2025
Peer-reviewedYes

Publication series

SeriesEuropean Conference on Networks and Communications (EuCNC)
ISSN2475-6490

Conference

Title2025 Joint European Conference on Networks and Communications & 6G Summit
SubtitleTowards the 6G World
Abbreviated titleEuCNC & 6G Summit 2025
Duration3 - 6 June 2025
Website
LocationPoznań Congress Center
CityPoznan
CountryPoland

External IDs

Scopus 105010579197
ORCID /0000-0003-3045-6271/work/193705600
ORCID /0000-0002-1315-7635/work/193706694
ORCID /0000-0001-7075-8990/work/193706938
ORCID /0000-0001-8165-5735/work/193707091
Mendeley 43dcd09a-f42d-3d71-a49a-46bc111f583d

Keywords

Sustainable Development Goals

Keywords

  • energy efficiency, hardware non-linearity, massive MIMO, multipleinput multiple-output, spectral efficiency