Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems

doi:10.19682/j.cnki.1005-8885.2020.0042

中国邮电高校学报(英文版) ›› 2020, Vol. 27 ›› Issue (6): 8-16.doi: 10.19682/j.cnki.1005-8885.2020.0042

Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems

蔡兴蔚季伟邱玲梁晓雯

中国科学技术大学

收稿日期:2020-04-17 修回日期:2020-11-25 出版日期:2020-12-31 发布日期:2020-12-31
通讯作者: 邱玲 E-mail:lqiu@ustc.edu.cn
基金资助:
中国国家自然科学基金

Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems

Received:2020-04-17 Revised:2020-11-25 Online:2020-12-31 Published:2020-12-31
Supported by:
National Natural Science Foundation of China

摘要/Abstract

摘要：

A low complexity punctured belief propagation ( BP) detection utilizing channel puncturing for multi-user

multiple-input multiple-output (MU-MIMO) systems is proposed in this paper. This paper constructs a cycle-free fator graph by puncturing certain non-zero entries in a transformed channel matrix, and proposes an adjusted BP algorithm with a more exact a posteriori message updating equation. The proposed algorithm converges rapidly in several iterations due to the cycle-free structure in the factor graph. Nevertheless, puncturing brings distorted noise and thus leads to performance degradation. To tackle this issue, this article further designs a layered detection with the help of maximum likelihood detector ( MLD). Simulations demonstrate that the proposed detection algorithm achieves the identical performance to MLD with much lower complexity.

关键词: MU-MIMO, rich scattering wireless environment, BP, layered detection algorithm

Abstract:

A low complexity punctured belief propagation ( BP) detection utilizing channel puncturing for multi-user

Key words: MU-MIMO, rich scattering wireless environment, BP, layered detection algorithm

Cai Xingwei, Ji Wei, Qiu Ling, Liang Xiaowen. Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems[J]. The Journal of China Universities of Posts and Telecommunications, 2020, 27(6): 8-16.

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Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems

Channel puncturing based low-complexity belief propagation detection for multi-user MIMO systems

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