Reduced-complexity quasi-optimum detection for MIMO-OFDM signals with strong nonlinear distortion

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Abstract

MIMO-OFDM (Multi-Input, Multi-Output Orthogonal Frequency Division Multiplexing) signals are very prone to nonlinear distortion effects, which can lead to high irreducible error floors. This can be particularly serious when low-resolution quantizers are employed. In this paper we consider MIMO-OFDM schemes with low- resolution quantizers. It is shown that, although this leads to strong nonlinear distortion effects and very poor performance when conventional receivers are employed, this is not necessarily the case when optimum receivers are considered. Since the complexity of the optimum receiver for MIMO-OFDM is prohibitively high, we develop sub- optimum receivers with moderate complexity. It is shown that these receivers can have huge performance gains when the nonlinear distortion levels are high, eliminating irreducible error floors and even outperforming linear MIMO-OFDM schemes in some scenarios.

Original languageEnglish
Title of host publication2019 IEEE Globecom Workshops, GC Wkshps 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728109602
DOIs
Publication statusPublished - Dec 2019
Event2019 IEEE Globecom Workshops, GC Wkshps 2019 - Waikoloa, United States
Duration: 9 Dec 201913 Dec 2019

Publication series

NameIEEE Globecom Workshops
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISSN (Print)2166-0069

Conference

Conference2019 IEEE Globecom Workshops, GC Wkshps 2019
CountryUnited States
CityWaikoloa
Period9/12/1913/12/19

Keywords

  • Iterative receivers
  • MIMO
  • Nonlinear distortion
  • OFDM
  • Optimum detection

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