Bidirectional CSI measurement for V2X Communications

To test the reciprocity of V2X channel, bidirectional channel state information (CSI) measurement is conducted between Alice (RSU) and Bob (OBU) through PSSCH signal. We utilized two USRP X310 SDR platforms equipped with the CBX daughter board as Alice and Bob. Despite the designed fast USRP transceiver switching, there is a signal transmission delay of approximately 0.3 ms, resulting in a gap of about 4 to 5 symbols in the PSSCH subframe actually received by Alice and Bob.The USRP X310 was configured with a sampling rate of 30.72 MSample/s and the carrier frequency of the V2X signal was set at 5.91 GHz. We incorporated an additional amplifier to amplify the transmitted and received signals for the long-distance outdoor environment.Our experimental environment was set up on the internal roads of the Purple Mountain Laboratory, Nanjing, China. Alice (RSU) was positioned at the side of the road, while Bob (OBU) was installed in the vehicle. The vehicle traveled at various speeds along the road. Due to the speed limits, we collected CSI obtained at speeds of 40km/h, 30km/h, 20km/h, 10km/h, 5km/h, and stationary, resulting in a dataset with 23, 137, 45, 28, 15, and 96 CSI groups, respectively. The received PSSCH signals and estimated CSIs can be found in this dataset.

为检验车联网信道之互易性，通过 PSSCH 信号，在 Alice（RSU）与 Bob（OBU）之间进行双向信道状态信息（CSI）的测量。本研究采用两套配备 CBX 女儿板的 USRP X310 SDR 平台分别作为 Alice 和 Bob。尽管设计了快速的 USRP 收发器切换机制，但信号传输仍存在约 0.3 毫秒的延迟，导致 Alice 和 Bob 实际接收到的 PSSCH 子帧中存在约 4 至 5 个符号的间隔。USRP X310 被配置为以 30.72 MSample/s 的采样率运行，V2X 信号的载波频率被设定为 5.91 GHz。为适应长距离户外环境，我们对传输和接收信号添加了额外的放大器。实验环境设置在南京紫金山实验室内部道路。Alice（RSU）位于道路一侧，而 Bob（OBU）被安装在车辆中。车辆沿道路以不同的速度行驶。鉴于速度限制，我们收集了 40km/h、30km/h、20km/h、10km/h、5km/h 和静止状态下的 CSI，分别得到 23、137、45、28、15 和 96 个 CSI 组。接收到的 PSSCH 信号和估计的 CSI 可在本数据集中找到。

搜集汇总

背景与挑战

背景概述

该数据集专注于车联网（V2X）通信中的双向信道状态信息（CSI）测量，用于测试信道的互易性。实验使用USRP X310 SDR平台，在南京紫金山实验室的道路环境中进行，收集了不同车速（从静止到40km/h）下的CSI数据，共包含多个速度级别的CSI组。