Analysis of Nonlinear Low-Noise Amplifiers in Massive MIMO Base Stations
Paper i proceeding, 2018

Because of the large number of antennas at the base station, the power consumption and cost of the low-noise amplifiers (LNAs) can be substantial. Therefore, we investigate the feasibility of inexpensive, power efficient LNAs, which inherently are less linear. To characterize the nonlinear distortion, we describe the LNAs using a polynomial model, which allows for the derivation of the second-order statistics of the received signal and the distortion. We show that the distortion from the LNAs combines coherently, and that the SINR of the symbol estimates therefore is limited by the linearity of the LNAs. Furthermore, the impact of a strong transmitter in the adjacent frequency band is investigated. The second-order statistics show how the power from that transmission leaks into the main band and interferes with the symbol estimates.

massive MIMO

nonlinear hardware

Terms—low-noise amplifier


Christopher Mollén

Linköpings universitet

Ulf Gustavsson

Ericsson AB

Thomas Eriksson

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

E. G. Larsson

Linköpings universitet

Conference Record of the Asilomar Conference on Signals Systems and Computers

1058-6393 (ISSN)

978-1-5386-1823-3 (ISBN)

51st IEEE Asilomar Conference on Signals Systems and Computers
Pacific Grove, USA,


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