Ensemble-transfer-learning-based channel parameter prediction in asymmetric massive MIMO systems

Ensemble-transfer-learning-based channel parameter prediction in asymmetric massive MIMO systems

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Bibliographic Details
Published in:Frontiers of information technology & electronic engineering. - Zhejiang University Press, 2015. - 24(2023), 2 vom: Feb., Seite 275-288
Main Author: He, Zunwen (Author)
Other Authors: Li, Yue (Author) Zhang, Yan (Author) Zhang, Wancheng (Author) Zhang, Kaien (Author) Guo, Liu (Author) Wang, Haiming (Author)
Format: electronic Article
Language:English
Published: 2023
ISSN:2095-9230
External Sources:lizenzpflichtig
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520 |a Abstract Asymmetric massive multiple-input multiple-output (MIMO) systems have been proposed to reduce the burden of data processing and hardware cost in sixth-generation mobile networks (6G). However, in the asymmetric massive MIMO system, reciprocity between the uplink (UL) and downlink (DL) wireless channels is not valid. As a result, pilots are required to be sent by both the base station (BS) and user equipment (UE) to predict double-directional channels, which consumes more transmission and computational resources. In this paper we propose an ensemble-transfer-learning-based channel parameter prediction method for asymmetric massive MIMO systems. It can predict multiple DL channel parameters including path loss (PL), multipath number, delay spread (DS), and angular spread. Both the UL channel parameters and environment features are chosen to predict the DL parameters. Also, we propose a two-step feature selection algorithm based on the SHapley Additive exPlanations (SHAP) value and the minimum description length (MDL) criterion to reduce the computation complexity and negative impact on model accuracy caused by weakly correlated or uncorrelated features. In addition, the instance transfer method is introduced to support the prediction model in new propagation conditions, where it is difficult to collect enough training data in a short time. Simulation results show that the proposed method is more accurate than the back propagation neural network (BPNN) and the 3GPP TR 38.901 channel model. Additionally, the proposed instance-transfer-based method outperforms the method without transfer learning in predicting DL parameters when the beamwidth or the communication sector changes. 
700 1 |a Li, Yue  |4 aut 
700 1 |a Zhang, Yan  |0 (orcid)0000-0002-2168-9674  |4 aut 
700 1 |a Zhang, Wancheng  |4 aut 
700 1 |a Zhang, Kaien  |4 aut 
700 1 |a Guo, Liu  |4 aut 
700 1 |a Wang, Haiming  |4 aut 
773 0 8 |i Enthalten in  |t Frontiers of information technology & electronic engineering  |d Zhejiang University Press, 2015  |g 24(2023), 2 vom: Feb., Seite 275-288  |h Online-Ressource  |w (DE-627)821523775  |w (DE-600)2816472-6  |w (DE-576)428517315  |x 2095-9230  |7 nnns 
773 1 8 |g volume:24  |g year:2023  |g number:2  |g month:02  |g pages:275-288 
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