作者
Yaning Zou, Orod Raeesi, Lauri Antilla, Aki Hakkarainen, Joao Vieira, Fredrik Tufvesson, Qimei Cui, Mikko Valkama
发表日期
2015/12/6
研讨会论文
2015 IEEE Globecom Workshops (GC Wkshps)
页码范围
1-7
出版商
IEEE
简介
We investigate the impact of power amplifier (PA) nonlinear distortion in pre-coded multi-user large antenna or massive MIMO downlink systems. First, detailed signal and sys-tem models are derived for the received signal at single-antenna user equipment (UE) under channel-aware linear precoding in the base-station combined with behavioral models for the individ-ual PA units, covering both single-carrier and multi-carrier modulation schemes. Based on the derived models, it is shown that the PA induced nonlinear distortion can also combine coherently in the channel, depending on the relative differences between the phase characteristics of the different PA units and the corresponding distortion terms. Furthermore, it is also shown that the impact of nonlinear PAs and the resulting linear and nonlinear multi-user interference, quantified in terms of the received signal-to- interference-plus-noise ratio (SINR), is …
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Y Zou, O Raeesi, L Antilla, A Hakkarainen, J Vieira… - 2015 IEEE Globecom Workshops (GC Wkshps), 2015