To facilitate research in dynamic spectrum access, 5G, vehicular networks, underground wireless communications, and radio frequency machine learning, a city-wide experimental testbed is developed to provide realistic radio environment, standardized experimental configurations, reusable datasets, and advanced computational resources. The testbed contains 5 cognitive radio sites, and covers 1.1 square miles across two campuses of the University of Nebraska-Lincoln and a public street in the city of Lincoln, Nebraska. Each site is equipped with a 4x4 MIMO software-defined radio transceiver with 20Gbps fronthaul connectivity. Additional cognitive radio transceivers with an underground 2x2 MIMO antenna are included in a site. High speed fronthaul network based on dedicated fiber connects the 5 sites to a cloud-based central unit for data processing and storage. The testbed provides researchers rich computational resources such as arrays of CPUs and GPUs at the cloud and FPGAs at both the edge and fronthaul network. Developed via the collaboration of the university, city, and industrial partners, this testbed will facilitate education and researches in academic and industrial communities.

为了促进在动态频谱访问，5G，车载网络，地下无线通信和射频机器学习方面的研究，开发了一个全市范围的实验测试台，以提供逼真的无线电环境，标准化的实验配置，可重复使用的数据集和高级计算资源。该测试台包含5个认知无线电站点，覆盖内布拉斯加州林肯大学的两个校园以及内布拉斯加州林肯市的一条公共街道，覆盖1.1平方英里。每个站点都配备了具有20Gbps前传连接的4x4 MIMO软件定义的无线电收发器。一个站点中还包括带有地下2x2 MIMO天线的其他认知无线电收发器。基于专用光纤的高速前传网络将5个站点连接到基于云的中央单元，以进行数据处理和存储。该测试平台为研究人员提供了丰富的计算资源，例如云中的CPU和GPU阵列以及边缘和前传网络中的FPGA。通过大学，城市和行业合作伙伴的合作开发，该测试平台将促进学术界和工业界的教育和研究。