重庆大学微电子与通信工程学院,重庆,400044
纸质出版:2021
移动端阅览
廖勇, 田肖懿, 蔡志镕, 等. 面向C-V2I的基于边缘计算的智能信道估计[J]. 电子学报, 2021,49(5):833-842.
LIAO Yong, TIAN Xiao-yi, CAI Zhi-rong, et al. Intelligent Channel Estimation Based on Edge Computing for C-V2I[J]. Acta Electronica Sinica, 2021, 49(5): 833-842.
廖勇, 田肖懿, 蔡志镕, 等. 面向C-V2I的基于边缘计算的智能信道估计[J]. 电子学报, 2021,49(5):833-842. DOI: 10.12263/DZXB.20200953.
LIAO Yong, TIAN Xiao-yi, CAI Zhi-rong, et al. Intelligent Channel Estimation Based on Edge Computing for C-V2I[J]. Acta Electronica Sinica, 2021, 49(5): 833-842. DOI: 10.12263/DZXB.20200953.
车联网对于超高可靠与低时延通信(Ultra-Reliable and Low Latency Communications
URLLC)具有严格的要求
特别对于车到基础设施(Vehicle to Infrastructure
V2I)场景
URLLC对传输管理交通状况至关重要.3GPP Cellular-V2X(C-V2X)作为现在支撑车联网URLLC主流的无线技术
仍存在技术挑战.为进一步提升通信性能
本文在V2I场景下
基于车载终端、路侧单元(Road Side Unit
RSU)与边缘计算车联网服务器(Internet of Vehicles Server
IoV Server)的交互
设计了一种基于C-V2I规范的智能信道估计框架.在IoV Server中
本文提出了一种基于深度学习的信道估计算法
该算法利用一维卷积神经网络(One Dimensional Convolution Neural Network
1D CNN)完成频域插值和条件循环单元(Conditional Recurrent Unit
CRU)进行时域状态预测
通过引入额外的速度编码矢量和多径编码矢量跟踪环境的变化
对不同移动环境下的信道数据进行精确训练.最后通过系统仿真与分析表明
所提算法能够通过信道参数编码追踪不同高速移动环境下的信道变化
实现对信道数据的精确训练.与车联网代表性信道估计算法相比
所提算法提升了信道估计精度
降低了误码率和增强了鲁棒性.
Internet of vehicles has strict requirements in Ultra-Reliable and Low Latency Communications (URLLC). Especially in vehicle to infrastructure (V2I) scenario
URLLC is crucial to correctly transport and manage traffic conditions. 3GPP Cellular-V2X (C-V2X)
as the current mainstream wireless technology supporting the URLLC
still has technical challenges. In order to further improve the communication performance
this paper designs an intelligent channel estimation framework based on C-V2I specification based on the interaction between vehicle terminal
road side unit (RSU) and edge computing Internet of Vehicles server (IoV Server) in V2I communication scenario. In IoV Server
this paper proposes a channel estimation algorithm based on deep learning
which uses one-dimensional convolutional neural network (1D CNN) to complete frequency-domain interpolation and conditional recurrent unit (CRU) to predict the time-domain state. By introducing additional velocity coding vector and multipath coding vector
the channel data in different mobile environments are accurately trained. Finally
system simulation and analysis show that the proposed algorithm can track the channel changes in different high-speed mobile environments through channel parameter coding
and realize the accurate training of channel data. Compared with the representative channel estimation algorithms in the IoV
the proposed algorithm improves the channel estimation accuracy
reduces the bit error rate and enhances the robustness.
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