用摄像头图像预测车用毫米波通信接收功率,提升智能通信精度。
Vision Aided Channel Prediction for Vehicular Communications: A Case Study of Received Power Prediction Using RGB Images
- 分两阶段:先用视觉算法提取环境特征,再预测信号强度。
- 仅凭RGB图像实现高精度接收功率预测,实验验证有效。
- 适合车联网、6G智能通信研究者参考。
6G通信场景与信道特性将更加复杂,传统信道预测方法难以在准确性、实用性与泛化能力间取得平衡,且未能有效利用环境特征。在通智融合成为6G核心发展方向的背景下,亟需实现信道特性的智能预测。虽然视觉辅助方法已在多种无线通信任务中应用并展现优势,但尚未用于信道预测。本文提出一种面向毫米波车载通信的视觉辅助两阶段模型,仅利用RGB图像实现接收功率的精准预测。首先通过RGB相机获取传播环境原始图像;第一阶段采用目标检测、实例分割和二值掩码三种典型计算机视觉方法提取环境信息;第二阶段基于处理后的图像进行接收功率预测。模型分别使用预训练的YOLOv8和ResNets,并在数据集上微调。最后通过五组实验评估性能,验证了该模型在可行性、准确性和泛化能力方面的有效性,为车联网智能信道预测提供了新思路。
原文摘要 · Abstract (English)
The communication scenarios and channel characteristics of 6G will be more complex and difficult to characterize. Conventional methods for channel prediction face challenges in achieving an optimal balance between accuracy, practicality, and generalizability. Additionally, they often fail to effectively leverage environmental features. Within the framework of integration communication and artificial intelligence as a pivotal development vision for 6G, it is imperative to achieve intelligent prediction of channel characteristics. Vision-aided methods have been employed in various wireless communication tasks, excluding channel prediction, and have demonstrated enhanced efficiency and performance. In this paper, we propose a vision-aided two-stage model for channel prediction in millimeter wave vehicular communication scenarios, realizing accurate received power prediction utilizing solely RGB images. Firstly, we obtain original images of propagation environment through an RGB camera. Secondly, three typical computer vision methods including object detection, instance segmentation and binary mask are employed for environmental information extraction from original images in stage 1, and prediction of received power based on processed images is implemented in stage 2. Pre-trained YOLOv8 and ResNets are used in stages 1 and 2, respectively, and fine-tuned on datasets. Finally, we conduct five experiments to evaluate the performance of proposed model, demonstrating its feasibility, accuracy and generalization capabilities. The model proposed in this paper offers novel solutions for achieving intelligent channel prediction in vehicular communications.
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