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MIMO-Supporting Radio-over-Fiber System and Its Application in mmWave-based Indoor 5G Mobile Network
Journal of Lightwave Technology ( IF 4.1 ) Pub Date : 2020-01-01 , DOI: 10.1109/jlt.2019.2931318
Joonyoung Kim , Minkyu Sung , Seung-Hyun Cho , Young-Jun Won , Byoung-Chul Lim , Sung-Yeop Pyun , Joon-Ki Lee , Jong Hyun Lee

We demonstrate 4 × 4 multiple-input and multiple-output (MIMO) supporting mmWave-based indoor 5G mobile network based on a distributed antenna system (DAS) that has over-the-air interface to receive the broadband wireless signal from, e.g., remote radio head (RRH) of mobile fronthaul. To realize the cost/bandwidth-efficient and low-latency-inducing indoor 5G DAS network, we exploit the radio-over-fiber (RoF) system that is based on the intermediate frequency-over-fiber (IFoF) technology. To be more specific, we make simultaneous use of wavelength- and frequency-division multiplexing in the IFoF link so as to transport 4 × 4 MIMO 5G signal of which the bandwidth is effectively 3.2 GHz (= 4 × 800 MHz, where each antenna deals with 800 MHz 5G signal). The 4 × 4 MIMO-supporting IFoF link has error vector magnitude (EVM) performance of <4.5% at all channels of downlink and uplink for up to 2 km. The whole RoF system, exploiting the IFoF link, mmWave frequency conversion module, and control /management plane, proves itself to meet the 3GPP-defined EVM requirement (i.e., 8%) at all channels. Based on the RoF system, we demonstrate the indoor 5G DAS network in conjunction with Korea Telecom 5G mobile network, i.e., 5G baseband unit and RRH, investigating the downlink and uplink throughputs. We achieve ∼4 Gb/s total throughput for end user, where the additional latency induced by the DAS network is only a few hundreds of nanoseconds other than the single mode fiber transmission delay.

中文翻译:

支持MIMO的光纤无线系统及其在基于毫米波的室内5G移动网络中的应用

我们展示了 4 × 4 多输入多输出 (MIMO) 支持基于毫米波的室内 5G 移动网络,该网络基于分布式天线系统 (DAS),该系统具有无线接口以接收来自例如以下的宽带无线信号移动前传的远程无线电头端 (RRH)。为了实现成本/带宽高效、低延迟的室内 5G DAS 网络,我们开发了基于光纤中频 (IFoF) 技术的光纤无线电 (RoF) 系统。更具体地说,我们在 IFoF 链路中同时使用波分复用和频分复用,以传输 4 × 4 MIMO 5G 信号,其带宽有效地为 3.2 GHz(= 4 × 800 MHz,其中每个天线处理800 MHz 5G 信号)。支持 4 × 4 MIMO 的 IFOF 链路的误差矢量幅度 (EVM) 性能<4。下行链路和上行链路的所有信道为 5%,最长可达 2 公里。整个RoF 系统利用IFoF 链路、毫米波变频模块和控制/管理平面,证明其在所有信道上都满足3GPP 定义的EVM 要求(即8%)。基于 RoF 系统,我们结合韩国电信 5G 移动网络(即 5G 基带单元和 RRH)演示了室内 5G DAS 网络,研究了下行和上行吞吐量。我们为最终用户实现了约 4 Gb/s 的总吞吐量,其中 DAS 网络引起的额外延迟只有几百纳秒,而不是单模光纤传输延迟。证明自己在所有渠道上都满足 3GPP 定义的 EVM 要求(即 8%)。基于 RoF 系统,我们结合韩国电信 5G 移动网络(即 5G 基带单元和 RRH)演示了室内 5G DAS 网络,研究了下行和上行吞吐量。我们为最终用户实现了约 4 Gb/s 的总吞吐量,其中 DAS 网络引起的额外延迟只有几百纳秒,而不是单模光纤传输延迟。证明自己在所有渠道上都满足 3GPP 定义的 EVM 要求(即 8%)。基于 RoF 系统,我们结合韩国电信 5G 移动网络(即 5G 基带单元和 RRH)演示了室内 5G DAS 网络,研究了下行和上行吞吐量。我们为最终用户实现了约 4 Gb/s 的总吞吐量,其中 DAS 网络引起的额外延迟只有几百纳秒,而不是单模光纤传输延迟。
更新日期:2020-01-01
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