University of Oulu

T. Takahashi, A. Tolli, S. Ibi and S. Sampei, "Layered Belief Propagation for Low-Complexity Large MIMO Detection Based on Statistical Beams," ICC 2019 - 2019 IEEE International Conference on Communications (ICC), Shanghai, China, 2019, pp. 1-6. doi: 10.1109/ICC.2019.8761567

Layered belief propagation for low-complexity large MIMO detection based on statistical beams

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Author: Takahashi, Takumi1; Tölli, Antti2; Ibi, Shinsuke1;
Organizations: 1Department of Information and Communications Technology, Osaka University, Yamada-oka 2-1, Suita 565-0871, Japan
2Centre for Wireless Communications (CWC), University of Oulu, Finland - FI-90014
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2019
Publish Date: 2020-01-08


This paper proposes a novel layered belief propagation (BP) detector with a concatenated structure of two different BP layers for low-complexity large multi-user multi-input multi-output (MU-MIMO) detection based on statistical beams. To reduce the computational burden and the circuit scale on the base station (BS) side, the two-stage signal processing consisting of slow varying outer beamformer (OBF) and group-specific MU detection (MUD) for fast channel variations is effective. However, the dimensionality reduction of the equivalent channel based on the OBF results in significant performance degradation in subsequent spatial filtering detection. To compensate for the drawback, the proposed layered BP detector, which is designed for improving the detection capability by suppressing the intra- and inter-group interference in stages, is introduced as the poststage processing of the OBF. Finally, we demonstrate the validity of our proposed method in terms of the bit error rate (BER) performance and the computational complexity.

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Series: IEEE International Conference on Communications
ISSN: 1550-3607
ISSN-E: 1938-1883
ISSN-L: 1550-3607
ISBN: 978-1-5386-8088-9
ISBN Print: 978-1-5386-8089-6
Article number: 8761567
DOI: 10.1109/ICC.2019.8761567
Host publication: 2019 IEEE International Conference on Communications, ICC 2019; Shanghai; China; 20-24 May 2019 : Proceedings
Conference: IEEE International Conference on Communications
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was financially supported by JSPS KAKENHI Grant Number JP18H03765, Japan and the Osaka University Scholarship for Overseas Research Activities 2018.
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