A Learnable Optimization and Regularization Approach to Massive MIMO CSI Feedback
| العنوان: | A Learnable Optimization and Regularization Approach to Massive MIMO CSI Feedback |
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| المؤلفون: | Zhengyang Hu, Guanzhang Liu, Qi Xie, Jiang Xue, Deyu Meng, Deniz Gündüz |
| المصدر: | IEEE Transactions on Wireless Communications. :1-1 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Signal Processing (eess.SP), FOS: Computer and information sciences, Computer Science - Information Theory, Information Theory (cs.IT), Applied Mathematics, FOS: Electrical engineering, electronic engineering, information engineering, Electrical Engineering and Systems Science - Signal Processing, Electrical and Electronic Engineering, Computer Science Applications |
| الوصف: | Channel state information (CSI) plays a critical role in achieving the potential benefits of massive multiple input multiple output (MIMO) systems. In frequency division duplex (FDD) massive MIMO systems, the base station (BS) relies on sustained and accurate CSI feedback from users. However, due to the large number of antennas and users being served in massive MIMO systems, feedback overhead can become a bottleneck. In this paper, we propose a model-driven deep learning method for CSI feedback, called learnable optimization and regularization algorithm (LORA). Instead of using l 1 -norm as the regularization term, LORA introduces a learnable regularization module that adapts to characteristics of CSI automatically. The conventional Iterative Shrinkage-Thresholding Algorithm (ISTA) is unfolded into a neural network, which can learn both the optimization process and the regularization term by end-to-end training. We show that LORA improves the CSI feedback accuracy and speed. Besides, a novel learnable quantization method and the corresponding training scheme are proposed, and it is shown that LORA can operate successfully at different bit rates, providing flexibility in terms of the CSI feedback overhead. Various realistic scenarios are considered to demonstrate the effectiveness and robustness of LORA through numerical simulations. |
| تدمد: | 1558-2248 1536-1276 |
| DOI: | 10.1109/twc.2023.3275990 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c396a51265fec7626b0b1c0632847f48 https://doi.org/10.1109/twc.2023.3275990 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c396a51265fec7626b0b1c0632847f48 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15582248 15361276 |
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| DOI: | 10.1109/twc.2023.3275990 |