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Massive MU-MIMO-OFDM Downlink with One-Bit DACs and Linear Precoding

Sven Jacobsson (Institutionen för signaler och system, Kommunikationssystem) ; Giuseppe Durisi (Institutionen för signaler och system, Kommunikationssystem) ; Mikael Coldrey ; Christoph Studer
IEEE Global Communications Conference (GLOBECOM) (2017)
[Konferensbidrag, refereegranskat]

Massive multiuser (MU) multiple-input multiple- output (MIMO) is foreseen to be a key technology in future wireless communication systems. In this paper, we analyze the downlink performance of an orthogonal frequency division multiplexing (OFDM)-based massive MU-MIMO system in which the base station (BS) is equipped with 1-bit digital-to-analog converters (DACs). Using Bussgang’s theorem, we characterize the performance achievable with linear precoders (such as maximal-ratio transmission and zero forcing) in terms of bit error rate (BER). Our analysis accounts for the possibility of oversampling the time-domain transmit signal before the DACs. We further develop a lower bound on the information-theoretic sum-rate throughput achievable with Gaussian inputs. Our results suggest that the performance achievable with 1-bit DACs in a massive MU-MIMO-OFDM downlink are satisfactory provided that the number of BS antennas is sufficiently large.



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Denna post skapades 2017-09-06. Senast ändrad 2017-09-06.
CPL Pubid: 251738

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)

Ämnesområden

Informations- och kommunikationsteknik
Kommunikationssystem

Chalmers infrastruktur

C3SE/SNIC (Chalmers Centre for Computational Science and Engineering)