Analysis of out-of-band interference from saturated power amplifiers in Massive MIMO

Blandino, Steve; Desset, Claude; Bourdoux, André; Perre, Liesbet Van der; Pollin, Sofie

doi:10.1109/eucnc.2017.7980706

Cited by 13 publications

(12 citation statements)

References 9 publications

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“…The radiation pattern of the nonlinear distortion from large arrays has recently attracted attention because of its potential impact on the performance of massive MIMO systems [2]. Papers such as [3], [4] have suggested that the distortion combines non-coherently at the served users and vanishes with an increasing number of transmit antennas. These results were also corroborated to some extent (for in-band distortion) via simulations in [5].…”

Section: Introductionmentioning

confidence: 99%

Spatial Characteristics of Distortion Radiated From Antenna Arrays With Transceiver Nonlinearities

Mollén

Gustavsson

Eriksson

et al. 2018

IEEE Trans. Wireless Commun.

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The distortion from massive MIMO (multiple-inputmultiple-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 crosscorrelation 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.

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Section: Introductionmentioning

confidence: 99%

Spatial Characteristics of Distortion Radiated From Antenna Arrays With Transceiver Nonlinearities

Mollén

Gustavsson

Eriksson

et al. 2018

IEEE Trans. Wireless Commun.

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“…Employing a classical and powerful approach within a stochastic and static framework, a 2 × 2 OFDM-modulated MIMO transmitter is considered and studied in detail, and is subjected to correlated input streams, crosstalk, and nonlinear compression. The analysis complements previous analyses such as [20] and [21] which use a stochastic framework and take the temporal dimension into account. The employed approach provides insights into the problem at hand in a compact way.…”

Section: Introductionmentioning

confidence: 65%

Dirty MIMO Transmitters: Does It Matter?

Händel

Rönnow

2018

IEEE Trans. Wireless Commun.

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The radio frequency transmitter is a key component in contemporary multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing systems. A detailed study of a 2 × 2 MIMO transmitter subjected to correlated input data streams, nonlinear distortion, thermal noise, and crosstalk is provided by stochastic modeling. The effects of correlated input streams, crosstalk, and nonlinearities are studied in detail and exemplified both by approximate expressions and numerical simulations. Key results include exact and approximate expressions for the normalized mean-squared error (NMSE) for systems with or without digital predistortion; the relationship between NMSE and the signal-to-noise-and-distortion ratio, the properties of the distortion noise, and a novel design for power amplifier back-off for MIMO transmitters subject to crosstalk. The theoretical derivations are illustrated by numerical examples and simulation results, and their relationships to the state-of-theart research are discussed.

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“…We assume that the parameters of the behavioral model, i.e., the number of bits q and the step size ∆, are known to the BS. (7) and (10) into (12) we can write the discrete-time channel input-output relation, including the BS-side nonlinearities, in matrix form as…”

Section: Analog-to-digital Converter: Behavioral Modelmentioning

confidence: 99%

Massive MU-MIMO-OFDM Uplink with Hardware Impairments: Modeling and Analysis

Jacobsson

Gustavsson

Durisi

et al. 2018

2018 52nd Asilomar Conference on Signals, Systems, and Computers

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We study the impact of hardware impairments at the base station (BS) of an orthogonal frequency-division multiplexing (OFDM)-based massive multiuser (MU) multiple-input multipleoutput (MIMO) uplink system. We leverage Bussgang's theorem to develop accurate models for the distortions caused by nonlinear low-noise amplifiers, local oscillators with phase noise, and oversampling finite-resolution analog-to-digital converters. By combining the individual effects of these hardware models, we obtain a composite model for the BS-side distortion caused by nonideal hardware that takes into account its inherent correlation in time, frequency, and across antennas. We use this composite model to analyze the impact of BS-side hardware impairments on the performance of realistic massive MU-MIMO-OFDM uplink systems.

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Analysis of out-of-band interference from saturated power amplifiers in Massive MIMO

Cited by 13 publications

References 9 publications

Spatial Characteristics of Distortion Radiated From Antenna Arrays With Transceiver Nonlinearities

Spatial Characteristics of Distortion Radiated From Antenna Arrays With Transceiver Nonlinearities

Dirty MIMO Transmitters: Does It Matter?

Massive MU-MIMO-OFDM Uplink with Hardware Impairments: Modeling and Analysis

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