Kim Joonyoung, Sung Minkyu, Kim Eon-Sang, Cho Seung-Hyun, Lee Jong Hyun
Opt Express. 2018 Oct 29;26(22):28216-28227. doi: 10.1364/OE.26.028216.
We demonstrate the analog indoor distributed antenna system (DAS) for 5G mobile communications that supports 4 × 4 multiple-input multiple-output (MIMO) configuration. For this, we exploit a pair of intermediate frequency over fiber (IFoF)-based analog optical links, transporting 32 frequency allocation (FA) 5G mobile signals (effectively 4 GHz bandwidth). The analog optical link manifests its high fidelity in the measured characteristics: small gain variation (< ± 1 dB for the entire transmission bandwidth), low noise (<-136 dBm/Hz), and large dynamic range (spurious free dynamic range of >106 dB∙Hz), subsequently providing superior error vector magnitude (EVM) performance (2%) for a wide range of ambient temperatures (-20 ~60°C). Consequently, the IFoF-based 4 × 4 MIMO supporting analog indoor DAS is capable of providing record high peak throughput of 5.3 Gb/s for millimeter wave based 5G mobile communication system.
我们展示了用于5G移动通信的模拟室内分布式天线系统（DAS），该系统支持4×4多输入多输出（MIMO）配置。为此，我们利用了一对基于光纤中频（IFoF）的模拟光链路，传输32个频率分配（FA）的5G移动信号（有效带宽约为4 GHz）。模拟光链路在测量特性中表现出高保真度：增益变化小（在整个传输带宽内<±1 dB）、噪声低（<-136 dBm/Hz）以及动态范围大（无杂散动态范围>106 dB∙Hz），随后在很宽的环境温度范围（-20~60°C）内提供了卓越的误差向量幅度（EVM）性能（约2%）。因此，基于IFoF的支持模拟室内DAS的4×4 MIMO能够为基于毫米波的5G移动通信系统提供创纪录的5.3 Gb/s高峰吞吐量。
