Reduced Complexity Correlation-Based Multi-Stream DPD for Hybrid Massive MIMO

Date

2024-01-01

Author

Salman, Murat Babek
Ucuncu, Ali Bulut
Güvensen, Gökhan Muzaffer

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

28
views

0
downloads

Cite This

This paper proposes a reduced complexity digital predistortion (DPD) scheme for fully-connected hybrid beamforming systems for massive multiple-input multiple-output (MIMO) channels impaired by nonlinear power amplifiers (PAs). Due to the inherent physical structure of the fully-connected hybrid beamforming architecture, we consider a two-stage vector DPD method to linearize the received signal at the user terminal by performing single input DPD operations at the virtual antenna elements and combining the predistorted virtual outputs properly. The required computational complexity is reduced by exploiting the spatial correlation of the antenna input signals such that redundant computation of the nonlinear complex DPD implementation is eliminated. Our results demonstrate that we can outperform the existing DPD solutions for fully-connected hybrid MIMO in terms of out-of-band emissions, the error-vector magnitude of the received signals, and computational complexity.

Subject Keywords

Antennas, Array signal processing, DPD, EVM, fully-connected, Hybrid massive MIMO, Massive MIMO, Millimeter wave communication, MIMO communication, Nonlinear distortion, OOB, Radio frequency, vector digital predistortion

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85181570653&origin=inward
https://hdl.handle.net/11511/108112

Collections

Department of Electrical and Electronics Engineering, Article