Implementation of a Multi-Gbit/s and GFDM-based Optical-Wireless 5G Network

Abstract We report the implementation of an optical-wireless 5G network based on generalized frequency division multiplexing (GFDM) and multi-Gbit/s communication. Dual-drive Mach-Zehnder modulator was employed, enabling simultaneously RF signals transport using two 5G candidate bands, namely: 26 GHz band for providing a femtocell with 2 Gbit/s throughput; 700 MHz band for enabling rural access applying a supercell. A vector signal generator provides the broadband 26 GHz signal. The Brazilian GFDM-based 5G transceiver generates the lower-frequency signal, with the advantage of low out-of-band emission. An experimental digital performance analysis illustrates the suitability of the proposed solution to address 5G requirements.摘要 本研究报道了一种基于广义频分复用（generalized frequency division multiplexing, GFDM）与多吉比特每秒通信的光无线5G网络的实现方案。本方案采用双驱动马赫-曾德尔调制器，可同时利用两个5G候选频段传输射频信号：其一为26吉赫兹频段，用于为飞蜂窝提供2吉比特每秒的吞吐量；其二为700兆赫兹频段，用于通过超大蜂窝实现农村接入。矢量信号发生器用于生成宽带26吉赫兹信号，而基于GFDM的巴西研发5G收发信机则生成低频段信号，其优势在于带外辐射较低。实验性数字性能分析结果表明，所提方案可满足5G网络的各项需求。