Broadband V-band Radio over Fiber Uplink Fronthaul Transmission Using Cascaded Microwave Photonic Downconversion Topology

作     者：Zhang Hui Li Peixuan Zou Xihua Bai Wenlin Pan Wei Yan Lianshan 

作者机构：School of Information Science&TechnologyCenter for Information Photonics&CommunicationsSouthwest Jiaotong UniversityChengdu 610031SichuanChina 

出 版 物：《激光与光电子学进展》 (Laser & Optoelectronics Progress)

年 卷 期：2022年第59卷第13期

页      面：435-442页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 0702[理学-物理学] 

基　　金：国家重点研发计划(2019YFB2203200) 国家自然科学基金(62001401) 中央高校基本科研业务费专项资金(2682021CX045) 四川省科技计划(2022JDTD0013) 

主　　题：millimeter-wave radio over fiber fifth-generation and beyond networks microwave photonic downconversion 

摘      要：Exploiting microwave photonic(MWP)techniques to generate and distribute high-frequency millimeter-wave(mm-wave)signals,termed mm-wave radio over fiber(m-RoF)signals,holds considerable potential for achieving highdensity and high-capacity fifth-generation and beyond ***,we experimentally validate a broadband m-RoF uplink fronthaul transmission system using the MWP downconversion concept,which comprises receiving and processing radio-frequency(RF)signals in the unlicensed V-band at around 60 *** proposed system harnesses the simple cascaded modulator topology,in which an ultrawideband off-the-shelf Mach–Zehnder modulator(MZM)renders a simplestructured remote radio head by directly encoding the broadband 60 GHz uplink RF signal into the optical *** nonlinear transfer function of another MZM at the center unit is explored to achieve subharmonic downconversion using cost-effective low-frequency local oscillator *** on proof-of-concept experiments,mm-wave four quadrature amplitude modulation orthogonal frequency-division multiplexing signals centered at frequencies ranging from 51 GHz to 70 GHz are successfully downconverted into signals at the intermediate frequency(IF)of 1.4 *** the case of 1.2 m mm-wave,free-space,and 5 km m-RoF transmissions,the obtained IF signals with a total bandwidth of 2.4 GHz achieve a bit-to-error ratio performance lower than the 7%hard-decision forward error correction limit of 3.8×10^(−3).A gross bit rate of 10 Gbit/s can be achieved over a total spectrum of up to 10 GHz,which fully covers the globally unlicensed V-band of 57-66 GHz.