Spatial Characteristics of Distortion Radiated from Antenna Arrays with Transceiver Nonlinearities
Artikel i vetenskaplig tidskrift, 2018

The distortion from massive MIMO (multiple-input--multiple-output) base stations with nonlinear amplifiers is studied and its radiation pattern is derived. The distortion is analyzed both in-band and out-of-band. By using an orthogonal Hermite representation of the amplified signal, the spatial cross-correlation matrix of the nonlinear distortion is obtained. It shows that, if the input signal to the amplifiers has a dominant beam, the distortion is beamformed in the same way as that beam. When there are multiple beams without any one being dominant, it is shown that the distortion is practically isotropic. The derived theory is useful to predict how the nonlinear distortion will behave, to analyze the out-of-band radiation, to do reciprocity calibration, and to schedule users in the frequency plane to minimize the effect of in-band distortion.

out-of-band radiation

in-band distortion

massive multiple-input multiple-output

nonlinear

Amplifiers

spectral regrowth

distortion

reciprocity calibration

Författare

Christopher Mollen

Linköpings universitet

Ulf Gustavsson

Ericsson AB

Thomas Eriksson

Chalmers, Elektroteknik, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

E. G. Larsson

Linköpings universitet

IEEE Transactions on Wireless Communications

1536-1276 (ISSN)

Vol. 17 10 6663-6679 8429913

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Signalbehandling

DOI

10.1109/TWC.2018.2861872

Mer information

Senast uppdaterat

2019-01-18