Low-Complexity Equalisers for Offset Constellations in Massive MIMO Schemes

Pedro Bento, Andreia Pereira, Rui Dinis, Marco A. C. Gomes, Vitor Silva

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Massive multi-input-multi-output (m-MIMO) schemes require low-complexity implementations at both the transmitter and the receiver side, especially for systems operation at millimeter wave (mmWave) bands. In this paper, we consider the use of offset constellations in m-MIMO systems operating at mmWave frequencies. These signals are designed to have either an almost constant envelope or be decomposed as the sum of constant-envelope signals, making them compatible with strongly nonlinear power amplifiers, which can have low-implementation complexity and high amplification efficient, making them particularly interesting for mmWave communications. We design and evaluate low-complexity frequency-domain receivers for offset signals. It is shown that the proposed receivers can have excellent performance/complexity trade-offs in m-MIMO scenarios, making them particularly interesting for future wireless systems operating at mmWave bands.

Original languageEnglish
Article number8755976
Pages (from-to)94373-94390
Number of pages18
JournalIEEE Access
Publication statusPublished - 2019


  • frequency-domain receivers
  • massive MIMO
  • mmWave communications
  • Offset modulations


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