Digital Predistortion for Multiuser Hybrid MIMO at mmWaves
Brihuega, Alberto ; Anttila, Lauri ; Abdelaziz, Mahmoud ; Eriksson, Thomas ; Tufvesson, Fredrik LU
and Valkama, Mikko
(2020)
In IEEE Transactions on Signal Processing
68.
p.3603-3618
- Abstract
Efficient mitigation of power amplifier (PA) nonlinear distortion in multi-user hybrid precoding based broadband mmWave systems is an open research problem. In this article, we carry out detailed signal and distortion modeling in broadband multi-user hybrid MIMO systems, with a bank of nonlinear PAs in each subarray, while also take the inevitable crosstalk between the antenna/PA branches into account. Building on the derived models, we adopt and describe an efficient closed-loop (CL) digital predistortion (DPD) solution that utilizes only a single-input DPD unit per transmit chain or subarray, despite crosstalk, providing thus substantial complexity-benefit compared to the state-of-the art multi-dimensional DPD solutions. We show that... (More)
Efficient mitigation of power amplifier (PA) nonlinear distortion in multi-user hybrid precoding based broadband mmWave systems is an open research problem. In this article, we carry out detailed signal and distortion modeling in broadband multi-user hybrid MIMO systems, with a bank of nonlinear PAs in each subarray, while also take the inevitable crosstalk between the antenna/PA branches into account. Building on the derived models, we adopt and describe an efficient closed-loop (CL) digital predistortion (DPD) solution that utilizes only a single-input DPD unit per transmit chain or subarray, despite crosstalk, providing thus substantial complexity-benefit compared to the state-of-the art multi-dimensional DPD solutions. We show that under spatially correlated multipath propagation, each single-input DPD unit can provide linearization towards every intended user, or more generally, towards all spatial directions where coherent propagation is taking place, and that the adopted CL DPD system is robust against crosstalk. Extensive numerical results building on practical measurement-based mmWave PA models are provided, demonstrating and verifying the excellent linearization performance of the overall DPD system in different evaluation scenarios.
(Less)
- author
- Brihuega, Alberto
; Anttila, Lauri
; Abdelaziz, Mahmoud
; Eriksson, Thomas
; Tufvesson, Fredrik
LU
and Valkama, Mikko
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Crosstalk, digital predistortion, hybrid MIMO, large-array transmitters, millimeter wave communications, multi-user MIMO, nonlinear distortion, out-of-band emissions, power amplifiers
- in
- IEEE Transactions on Signal Processing
- volume
- 68
- article number
- 9097919
- pages
- 16 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85087520842
- ISSN
- 1053-587X
- DOI
- 10.1109/TSP.2020.2995972
- language
- English
- LU publication?
- yes
- id
- 8c7f2128-ada9-40ae-9422-2bdb0c123409
- date added to LUP
- 2020-07-20 09:13:03
- date last changed
- 2022-05-12 03:52:58
@article{8c7f2128-ada9-40ae-9422-2bdb0c123409,
abstract = {{<p>Efficient mitigation of power amplifier (PA) nonlinear distortion in multi-user hybrid precoding based broadband mmWave systems is an open research problem. In this article, we carry out detailed signal and distortion modeling in broadband multi-user hybrid MIMO systems, with a bank of nonlinear PAs in each subarray, while also take the inevitable crosstalk between the antenna/PA branches into account. Building on the derived models, we adopt and describe an efficient closed-loop (CL) digital predistortion (DPD) solution that utilizes only a single-input DPD unit per transmit chain or subarray, despite crosstalk, providing thus substantial complexity-benefit compared to the state-of-the art multi-dimensional DPD solutions. We show that under spatially correlated multipath propagation, each single-input DPD unit can provide linearization towards every intended user, or more generally, towards all spatial directions where coherent propagation is taking place, and that the adopted CL DPD system is robust against crosstalk. Extensive numerical results building on practical measurement-based mmWave PA models are provided, demonstrating and verifying the excellent linearization performance of the overall DPD system in different evaluation scenarios.</p>}},
author = {{Brihuega, Alberto and Anttila, Lauri and Abdelaziz, Mahmoud and Eriksson, Thomas and Tufvesson, Fredrik and Valkama, Mikko}},
issn = {{1053-587X}},
keywords = {{Crosstalk; digital predistortion; hybrid MIMO; large-array transmitters; millimeter wave communications; multi-user MIMO; nonlinear distortion; out-of-band emissions; power amplifiers}},
language = {{eng}},
pages = {{3603--3618}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Transactions on Signal Processing}},
title = {{Digital Predistortion for Multiuser Hybrid MIMO at mmWaves}},
url = {{http://dx.doi.org/10.1109/TSP.2020.2995972}},
doi = {{10.1109/TSP.2020.2995972}},
volume = {{68}},
year = {{2020}},
}