University of Oulu

T. Takahashi, A. Tölli, S. Ibi and S. Sampei, "Concatenated Beam- and Antenna-domain Layered Belief Propagation for Large MIMO Detection," 2019 16th International Symposium on Wireless Communication Systems (ISWCS), Oulu, Finland, 2019, pp. 592-596. doi: 10.1109/ISWCS.2019.8877322

Concatenated beam- and antenna-domain layered belief propagation for large MIMO detection

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Author: Takahashi, Takumi1; Tölli, Antti2; Ibi, Shinsuke3;
Organizations: 1Department of Information and Communications Technology, Osaka University, Yamada-oka 2-1, Suita 565-0871, Japan
2Centre for Wireless Communications (CWC), FI-90014 University of Oulu, Finland
3Faculty of Science and Engineering, Doshisha University, 1-3 Tataramiyakodani, Kyotanabe-shi, 610-0394, Japan
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2019
Publish Date: 2020-01-08


This paper proposes concatenated beam- and antenna-domain belief propagation (BP) based signal detector for realizing low-complexity large multi-user multi-input multi-output (MU-MIMO) detection. As a low-complexity strategy for large-scale MU detection (MUD), group-specific signal detection in the beam domain has been proposed, where user equipments (UEs) are grouped based on the long-term channel statistics at a base station (BS) to design outer beamformer (OBF). In this case, the BP-based algorithm is effective as the subsequent signal detector to compensate for the performance degradation due to the dimensionality reduction caused by the OBF. However, the convergence characteristics of beam-domain BP is degraded as compared to the antenna-domain BP due to increased correlation between the beliefs. To avoid the impairments, we propose a novel concatenated structure of beam- and antenna-domain BP layers, which allows us to benefit from the advantages of both domains while maintaining low signal processing complexity. Numerical results show the validity of our proposed method in terms of the bit error rate (BER) performance both in the coded and uncoded cases and the computational complexity.

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Series: International Symposium on Wireless Communication Systems
ISSN: 2154-0217
ISSN-E: 2154-0225
ISSN-L: 2154-0217
ISBN: 978-1-7281-2527-5
ISBN Print: 978-1-7281-2528-2
Pages: 592 - 596
DOI: 10.1109/ISWCS.2019.8877322
Host publication: 2019 16th International Symposium on Wireless Communication Systems (ISWCS) 27-30 August 2019 Oulu, Finland
Conference: International Symposium on Wireless Communication Systems
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.
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