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1-Bit Massive MIMO Transmission: Embracing Interference with Symbol-Level Precoding

IEEE Communications Magazine | Li A, Masouros C, Swindlehurst AL, Yu W | The deployment of large-scale antenna arrays for cellular base stations (BSs), called massive MIMO, has been a key enabler ...

3 June 2021

1-Bit Massive MIMO Transmission: Embracing Interference with Symbol-Level Precoding

Abstract

 

The deployment of large-scale antenna arrays for cellular base stations (BSs), called massive MIMO, has been a key enabler for meeting the ever increasing capacity requirement for 5G communication systems and beyond. Despite their promising performance, fully digital massive MIMO systems require a large number of hardware components including radio frequency chains, power amplifiers, digital-to-analog converters (DACs), and so on, resulting in a huge increase in terms of the total power consumption and hardware costs for cellular BSs. Toward both spectrally-efficient and energy-efficient massive MIMO deployment, a number of hardware limited architectures have been proposed, including hybrid analog-digital structures, constant-envelope transmission, and the use of low-resolution DACs.
In this article, we overview the recent advances in improving the error rate performance of massive MIMO systems with 1-bit DACs through precoding at the symbol level. This line of research goes beyond traditional interference suppression or cancellation techniques by managing interference on a symbol-by-symbol basis.
This provides unique opportunities for interference-aware precoding tailored for practical massive MIMO systems. In this article, we first explain the concept of constructive interference (CI) and elaborate on how CI can benefit the 1-bit signal design by exploiting the traditionally undesired multi-user interference as well as the interference from imperfect hardware components. We then overview several solutions for 1-bit signal design to illustrate the gains achievable by exploiting CI. Finally, we identify some challenges and future research directions for 1-bit massive MIMO systems that have yet to be explored.

Publication Type:Journal Article
Publication Sub Type:Article
Authors:Li A, Masouros C, Swindlehurst AL, Yu W
Publisher:Institute of Electrical and Electronics Engineers
Publication date:03/06/2021
Pagination:121, 127
Journal:IEEE Communications Magazine
Volume:59
Issue:5
Status:Published 
Print ISSN:0163-6804
Keywords:Science & Technology, Technology, Engineering, Electrical & Electronic, Telecommunications, Engineering, ONE-BIT, EXPLOITATION, SYSTEMS
Author URL:http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp...
DOI:http://dx.doi.org/10.1109/MCOM.001.2000601
Full Text URL:

https://discovery.ucl.ac.uk/id/eprint/10129917/


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