On the evaluation of clipping effects in massive MIMO-OFDM systems

João Guerreiro, Rui Dinis, Paulo Montezuma

Research output: Contribution to conferencePaper

Abstract

The combination of massive multiple input multiple output (MIMO) schemes with orthogonal frequency division multiplexing (OFDM) modulations are being considered for 5th generation (5G) wireless broadband systems. However, both the high complexity associated to massive MIMO transceivers as well as the amplification problems of OFDM constitute important drawbacks of such combination. In this paper we propose a reduced complexity, energy efficient massive MIMO OFDM scheme. For that purpose, we consider a maximal ratio transmit (MRT) technique combined with a simple time-domain clipping operation. We present an analytical method for obtaining both the power spectral density (PSD) of the transmitted signals, as well as the signal-to-interference (SIR) at the detection level. It is shown that having a large number of transmit antennas not only provides the known power and capacity gains, but also increases the robustness to nonlinear distortion effects.

Original languageEnglish
DOIs
Publication statusPublished - 17 Mar 2017
Event84th IEEE Vehicular Technology Conference, VTC Fall 2016 - Montreal, Canada
Duration: 18 Sep 201621 Sep 2016

Conference

Conference84th IEEE Vehicular Technology Conference, VTC Fall 2016
CountryCanada
CityMontreal
Period18/09/1621/09/16

Keywords

  • Massive MIMO
  • MRT
  • Nonlinear distortion effects
  • OFDM

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    Guerreiro, J., Dinis, R., & Montezuma, P. (2017). On the evaluation of clipping effects in massive MIMO-OFDM systems. Paper presented at 84th IEEE Vehicular Technology Conference, VTC Fall 2016, Montreal, Canada. https://doi.org/10.1109/VTCFall.2016.7881121