Abstract
In this paper, we propose a novel power amplifier (PA) dimensioning method for massive multiple-input multiple-output (MIMO) systems whose number of transmitting antennas is adapted according to the number of user equipments (UEs) in the cell. The dimensioning method sets the maximum output powers of PAs unequally according to the pre-calculated average per-antenna transmission powers for different number of UEs. This allows PAs to operate at higher efficiency when the average per-antenna transmission powers vary due to the adaptive number of transmitting antennas. The performance of the method is evaluated in the symmetric multi-cellular scenario using a comprehensive power consumption model that considers both base station and UEs. When simple class-B PAs are used at the base station, unequal PA dimensioning reduces the PA power consumption up to 42 % when compared to the conventional equal PA dimensioning. This improves the total system energy efficiency. The benefits of the proposed unequal PA dimensioning are that no prior knowledge of the UE distribution is needed and good performance is achieved for all UE densities.
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring) |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Number of pages | 6 |
| ISBN (Electronic) | 978-1-5090-1698-3 |
| ISBN (Print) | 978-1-5090-1699-0 |
| DOIs | |
| Publication status | Published - 7 Jul 2016 |
| MoE publication type | A4 Article in a conference publication |
| Event | IEEE Vehicular Technology Conference - Nanjing, China Duration: 15 May 2016 → 18 May 2016 Conference number: 83 |
Conference
| Conference | IEEE Vehicular Technology Conference |
|---|---|
| Abbreviated title | VTC Spring |
| Country | China |
| City | Nanjing |
| Period | 15/05/16 → 18/05/16 |
Keywords
- antennas
- base stations
- electric power utilization
- energy efficiency
- MIMO systems
- telecommunication networks
- higher efficiency
- massive multiple-input- multiple-output system (MIMO)
- maximum output
- per antennas
- power consumption model
- prior knowledge
- transmitting antenna
- user equipments
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Cite this
Apilo, O., Lasanen, M., & Mämmelä, A. (2016). Unequal power amplifier dimensioning for adaptive massive MIMO base stations. In Proceedings : 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring) IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/VTCSpring.2016.7504517