Self-attention mechanism-based CSI eigenvector feedback for massive MIMO

Bei YANG; Xin LIANG; Hang YIN; Zheng JIANG; Xiaoming SHE

doi:10.11959/j.issn.1000-0801.2023247

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Self-attention mechanism-based CSI eigenvector feedback for massive MIMO

Research and Development | 更新时间：2024-06-05

- Self-attention mechanism-based CSI eigenvector feedback for massive MIMO
- Telecommunications Science Vol. 39, Issue 11, Pages: 128-136(2023)
- 作者机构：
  
  1. 中国电信股份有限公司研究院，北京 102209
  2. 北京邮电大学，北京 100876
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2023247
  CLC： TN929.5
- Published Online：2023-11，
  
  Published：20 November 2023
- 稿件说明：
移动端阅览
Bei YANG, Xin LIANG, Hang YIN, et al. Self-attention mechanism-based CSI eigenvector feedback for massive MIMO[J]. Telecommunications science, 2023, 39(11): 128-136.
DOI：

Bei YANG, Xin LIANG, Hang YIN, et al. Self-attention mechanism-based CSI eigenvector feedback for massive MIMO[J]. Telecommunications science, 2023, 39(11): 128-136. DOI： 10.11959/j.issn.1000-0801.2023247.

摘要

大规模多输入多输出（MIMO）系统可以为5G和未来无线通信系统提供令人满意的频谱效率的增益。在频分双工（FDD）模式下，需要将下行信道状态信息（CSI）的特征向量精确地反馈到基站侧以获得这种增益。为了提升下行 CSI 特征向量的反馈精度，提出了一种基于自注意力机制的 CSI 反馈方法 SA-CsiNet。SA-CsiNet通过分别在编、解码器部署自注意力模块实现CSI的特征提取和重构。仿真实验结果表明，相较于码本和传统的深度学习CSI反馈方案而言，SA-CsiNet能够提供更高的CSI重建精度。

Abstract

Massive multiple-input multiple-output (MIMO) system can provide satisfying gain of spectrum efficiency for 5G and future wireless communication systems.In frequency-division duplex (FDD) mode

downlink channel state information (CSI) needs to be accurately fed back to the base station side to obtain this gain.To improve the feedback accuracy of downlink CSI eigenvector

a self-attention mechanism-based CSI feedback method named SA-CsiNet was proposed.SA-CsiNet respectively deployed self-attention modules at the encoder and the decoder to achieve feature extraction and reconstruction of CSI.Experimental results show that compared with codebook-based and conventional deep learning-based CSI feedback approaches

SA-CsiNet provides higher reconstruction accuracy of CSI.

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references

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