arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.06558eess.SP
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无线环境信息能否降低导频开销:一个CSI预测示例

Can Wireless Environmental Information Decrease Pilot Overhead: A CSI Prediction Example

Lianzheng Shi, Jianhua Zhang, Li Yu, Yuxiang Zhang, Zhen Zhang, Yichen Cai, Guangyi Liu

AI总结:

针对大规模MIMO系统中CSI获取开销高的问题,提出结合无线环境信息与导频模式优化的WEI-CSIP信道预测方法,可大幅降低导频开销并显著提升预测精度。

摘要:

信道状态信息(CSI)对大规模多输入多输出(MIMO)系统至关重要。随着天线规模增大,获取CSI会导致系统开销显著升高。在这篇快报中,我们提出一种新型信道预测方法WEI-CSIP(基于无线环境信息与导频模式优化的CSI预测),该方法利用无线环境信息结合导频模式优化实现CSI预测。具体而言,我们利用多视角图像从环境信息中提取移动台(MS)周围的散射体,随后通过卷积神经网络(CNN)提取环境特征图;此外,深度概率下采样(DPS)网络可获取最优固定导频模式;最后,设计了一个基于CNN的信道预测网络,利用环境特征图和部分CSI预测完整的CSI。仿真结果表明,WEI-CSIP可将导频开销从1/5降至1/8,同时提升了预测精度,归一化均方误差降至0.0113,与传统信道预测方法相比性能提升83.2%。

英文摘要:

Channel state information (CSI) is crucial for massive multi-input multi-output (MIMO) system. As the antenna scale increases, acquiring CSI results in significantly higher system overhead. In this letter, we propose a novel channel prediction method which utilizes wireless environmental information with pilot pattern optimization for CSI prediction (WEI-CSIP). Specifically, scatterers around the mobile station (MS) are abstracted from environmental information using multiview images. Then, an environmental feature map is extracted by a convolutional neural network (CNN). Additionally, the deep probabilistic subsampling (DPS) network acquires an optimal fixed pilot pattern. Finally, a CNN-based channel prediction network is designed to predict the complete CSI, using the environmental feature map and partial CSI. Simulation results show that the WEI-CSIP can reduce pilot overhead from 1/5 to 1/8, while improving prediction accuracy with normalized mean squared error reduced to 0.0113, an improvement of 83.2% compared to traditional channel prediction methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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