Nonlinear Precoding for Phase-Quantized Constant-Envelope Massive MU-MIMO-OFDM
Paper in proceeding, 2018

We propose a nonlinear phase-quantized constant-envelope precoding algorithm for the massive multi-user (MU) multiple-input multiple-output (MIMO) downlink. Specifically, we adapt the squared-infinity norm Douglas-Rachford splitting (SQUID) precoder to systems that use oversampling digital-to-analog converters (DACs) at the base station (BS) and orthogonal frequency-division multiplexing (OFDM) to communicate over frequency-selective channels. We demonstrate that the proposed SQUID-OFDM precoder is able to generate transmit signals that are constrained to constant envelope, which enables the use of power-efficient analog radio-frequency circuitry at the BS. By quantizing the phase of the resulting constant-envelope signal, we obtain a finite-cardinality transmit signal that can be synthesized by low-resolution (e.g., 1-bit) DACs. We use error-rate simulations to demonstrate the superiority of SQUID-OFDM over linear-quantized precoders for massive MU-MIMO-OFDM systems.

Digital to analog conversion

Mobile telecommunication systems

MIMO systems

Gain control

Author

Sven Jacobsson

Ericsson

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Oscar Castaneda

Cornell University

Charles Jeon

Cornell University

Giuseppe Durisi

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Christoph Studer

Cornell University

2018 25TH INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS (ICT)

367-372
978-1-5386-2321-3 (ISBN)

25th International Conference on Telecommunications (ICT)
Saint Malo, France,

Massive MIMO systems with low-resolution converters

Swedish Foundation for Strategic Research (SSF) (ID14-0022), 2015-03-01 -- 2020-02-28.

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/ICT.2018.8464896

More information

Latest update

2/7/2020 9