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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.
Original language | English |
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Title of host publication | 2018 25th International Conference on Telecommunications, ICT 2018 |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 121-126 |
Number of pages | 6 |
ISBN (Print) | 9781538623213 |
DOIs | |
Publication status | Published - 13 Sept 2018 |
Event | 25th International Conference on Telecommunications, ICT 2018 - Saint Malo, France Duration: 26 Jun 2018 → 28 Jun 2018 |
Conference
Conference | 25th International Conference on Telecommunications, ICT 2018 |
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Country/Territory | France |
City | Saint Malo |
Period | 26/06/18 → 28/06/18 |
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Dive into the research topics of 'A reduced-complexity linear precoding strategy for massive MIMO base stations'. Together they form a unique fingerprint.Projects
- 1 Finished
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SILIKA: Silicon-based Ka-band massive MIMO antenna systems for new telecommunication services SPS
Willems, F. M. J. (Project Manager), Farsaei, A. (Project member), Alvarado, A. (Project Manager), Sanders, R. (Project communication officer), Barreiro, A. (Project member) & de Jonge, M. (Project communication officer)
1/09/16 → 31/08/20
Project: Research direct
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