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arXiv · 2111.14548

Out-of-Band Distortion in Massive MIMO: What to expect under realistic conditions?

Laura Monteyne·Gilles Callebaut·Björn Sihlbom·Liesbet Van der Perre
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Abstract

Massive Multiple Input Multiple Output (MIMO) offers superior capacity for future networks. In the quest for energy efficient implementation of these large array-based trans-mission systems, the power consumption of the Power Amplifiers(PAs) is a main bottleneck. This paper investigates whether it is possible to operate the PAs in their efficient nonlinear region, as the Out-of-Band (OOB) distortion may not get the same array gain as the in-band (IB) signals. We present a framework to simulate the effects under realistic conditions, leveraging on an accurate Ray-Tracing Simulator (RTS). The results show that the often assumed i.i.d. Rayleigh fading channel model results in too optimistic predictions, also in Non Line of Sight (NLoS) multi-path scenarios, regarding the spatial distribution of OOB emissions. We further comment on the consequences in view of current regulatory constraints.

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Laura Monteyne, Gilles Callebaut, Björn Sihlbom, Liesbet Van der Perre. 2021-11-29. Out-of-Band Distortion in Massive MIMO: What to expect under realistic conditions?. https://arxiv.org/abs/2111.14548

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