A reduced-complexity linear precoding strategy for massive MIMO base stations

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Conjugate beamforming (CB) and zero-forcing (ZF) are well-known linear precoders, which have optimized hardware implementations. In this work, a linear precoder is proposed based on switching between CB and ZF for line-of-sight propagation environments. The proposed idea is to predict and use the precoder, which results in the highest sum-rate for a given channel. To this end, three regimes are introduced for the ratio of power per user at the base station (BS) over noise power at a user receiver. For low values of this ratio, CB and for high values, ZF result in the highest sum-rate. For moderate values, a precoding strategy is proposed to switch to the best precoder. The switching mechanism is based on an upper bound for the ZF sum-rate, which we introduced in this work. The proposed precoding strategy achieves a sum-rate higher than both CB and ZF. Simulation results for a massive MIMO system including a l00-antenna BS, show up to 8% improvement on the sum-rate compared to CB and ZF. In addition, the proposed precoder reduces computational complexity up to 16.5% compared to the ZF precoding.

LanguageEnglish
Title of host publication2018 25th International Conference on Telecommunications, ICT 2018
PublisherInstitute of Electrical and Electronics Engineers
Pages121-126
Number of pages6
ISBN (Print)9781538623213
DOIs
StatePublished - 13 Sep 2018
Event25th International Conference on Telecommunications, ICT 2018 - Saint Malo, France
Duration: 26 Jun 201828 Jun 2018

Conference

Conference25th International Conference on Telecommunications, ICT 2018
CountryFrance
CitySaint Malo
Period26/06/1828/06/18

Fingerprint

Beamforming
MIMO systems
Base stations
Computational complexity
Switches
Antennas
Hardware

Cite this

Farsaei, A., Willems, F., Alvarado, A., & Gustavsson, U. (2018). A reduced-complexity linear precoding strategy for massive MIMO base stations. In 2018 25th International Conference on Telecommunications, ICT 2018 (pp. 121-126). [8464908] Institute of Electrical and Electronics Engineers. DOI: 10.1109/ICT.2018.8464908
Farsaei, Amirashkan ; Willems, Frans ; Alvarado, Alex ; Gustavsson, Ulf. / A reduced-complexity linear precoding strategy for massive MIMO base stations. 2018 25th International Conference on Telecommunications, ICT 2018. Institute of Electrical and Electronics Engineers, 2018. pp. 121-126
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Farsaei, A, Willems, F, Alvarado, A & Gustavsson, U 2018, A reduced-complexity linear precoding strategy for massive MIMO base stations. in 2018 25th International Conference on Telecommunications, ICT 2018., 8464908, Institute of Electrical and Electronics Engineers, pp. 121-126, 25th International Conference on Telecommunications, ICT 2018, Saint Malo, France, 26/06/18. DOI: 10.1109/ICT.2018.8464908

A reduced-complexity linear precoding strategy for massive MIMO base stations. / Farsaei, Amirashkan; Willems, Frans; Alvarado, Alex; Gustavsson, Ulf.

2018 25th International Conference on Telecommunications, ICT 2018. Institute of Electrical and Electronics Engineers, 2018. p. 121-126 8464908.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Farsaei A, Willems F, Alvarado A, Gustavsson U. A reduced-complexity linear precoding strategy for massive MIMO base stations. In 2018 25th International Conference on Telecommunications, ICT 2018. Institute of Electrical and Electronics Engineers. 2018. p. 121-126. 8464908. Available from, DOI: 10.1109/ICT.2018.8464908