arXiv:2505.12664eess.SPcs.AI2025-05中稿 · IEEE Transactions …被引 5

用多视角信道信息生成目标三维点云,提升无线感知精度。

Multi-View Wireless Sensing via Conditional Generative Learning: Framework and Model Design

  • 构建双分支网络,融合多基站-终端间信道信息中的目标特征。
  • 引入空间位置嵌入,捕捉电磁波传播物理特性,适应不同部署布局。
  • 采用条件扩散模型生成点云,重建形状与电磁属性更准确。

本文将多视角基站-用户设备间信道状态信息(CSI)的高精度目标感知问题,建模为条件生成任务。设计了一种双分支神经网络架构:第一部分通过精心设计的编码器,融合多视角CSI中隐含的目标特征,并引入空间位置嵌入以捕获电磁波传播结构,适应不同基站-终端对的数量与位置;第二部分将融合后的特征作为条件输入,驱动强大的生成模型重建目标点云。具体采用带加权损失的条件扩散模型完成点云生成。大量数值实验表明,所提出的生成式多视角(Gen-MV)感知框架具有优异灵活性和显著性能提升,尤其在目标形状与电磁特性重建质量方面表现突出。

原文摘要 · Abstract (English)

In this paper, we incorporate physical knowledge into learning-based high-precision target sensing using the multi-view channel state information (CSI) between multiple base stations (BSs) and user equipment (UEs). Such kind of multi-view sensing problem can be naturally cast into a conditional generation framework. To this end, we design a bipartite neural network architecture, the first part of which uses an elaborately designed encoder to fuse the latent target features embedded in the multi-view CSI, and then the second uses them as conditioning inputs of a powerful generative model to guide the target's reconstruction. Specifically, the encoder is designed to capture the physical correlation between the CSI and the target, and also be adaptive to the numbers and positions of BS-UE pairs. Therein the view-specific nature of CSI is assimilated by introducing a spatial positional embedding scheme, which exploits the structure of electromagnetic(EM)-wave propagation channels. Finally, a conditional diffusion model with a weighted loss is employed to generate the target's point cloud from the fused features. Extensive numerical results demonstrate that the proposed generative multi-view (Gen-MV) sensing framework exhibits excellent flexibility and significant performance improvement on the reconstruction quality of target's shape and EM properties.

无线感知多视角生成模型点云重建

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