Low-Complexity Equalisers for Offset Constellations in Massive MIMO Schemes

• Autor(a) principal: Bento, Pedro
• Data de Publicação: 2019
• Outros Autores: Pereira, Andreia, Dinis, Rui, Gomes, Marco, Silva, Vitor
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• DOI: 10.1109/ACCESS.2019.2927090
• Texto Completo: http://hdl.handle.net/10316/107017; https://doi.org/10.1109/ACCESS.2019.2927090
• topic: Offset modulations; massive MIMO; mmWave communications; frequency-domain receivers

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 ampli ers, which can have low-implementation complexity and high ampli cation ef cient, 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.