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

Amirashkan Farsaei, Frans Willems, Alex Alvarado, Ulf Gustavsson

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

2 Citaten (Scopus)
168 Downloads (Pure)

Samenvatting

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.

Originele taal-2Engels
Titel2018 25th International Conference on Telecommunications, ICT 2018
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's121-126
Aantal pagina's6
ISBN van geprinte versie9781538623213
DOI's
StatusGepubliceerd - 13 sep 2018
Evenement25th International Conference on Telecommunications, ICT 2018 - Saint Malo, Frankrijk
Duur: 26 jun 201828 jun 2018

Congres

Congres25th International Conference on Telecommunications, ICT 2018
LandFrankrijk
StadSaint Malo
Periode26/06/1828/06/18

Vingerafdruk Duik in de onderzoeksthema's van 'A reduced-complexity linear precoding strategy for massive MIMO base stations'. Samen vormen ze een unieke vingerafdruk.

Citeer dit