GSM-R光纤直放站中射频光收发模块设计  

RF-optical transceiver module in GSM-R fiber optical repeater

作　　者：徐建[1] 王志功[1] 江汉[1] 马力[1] 

机构地区：[1]东南大学射频与光电集成电路研究所,南京210096

出　　处：《东南大学学报（自然科学版）》2011年第4期687-690,共4页Journal of Southeast University：Natural Science Edition

基　　金：中国博士后基金资助项目(20090461048);江苏省博士后科研资助项目(0901022C);东南大学博士后重点资助计划

摘　　要：对铁路GSM-R标准的光纤直放站中的射频光收发模块进行了设计、制造和测试.光发射部分的设计采用自动功率控制(APC)技术实现激光器功率的稳定输出,光接收部分采用冗余备份设计实现模块的高可靠性.测试结果表明,该模块光反射损耗小于-45 dB,接收时延低于60 ns.带外抑制和带内波动分别大于30 dB和小于0.5 dB,输入输出驻波比小于1.3.射频输出增益调节精度为1 dB,调节范围高达25 dB以上.同时,模块底噪声小于132 dBm/Hz,三阶互调达到-60 dBc以下.此外,模块提供了很好的告警和检测等功能.因此,该模块具有优异的射频光收发特性.模块最终在铁路GSM-R直放站中进行了实测,结果表明完全达到铁路设计要求.An RF-optical transceiver module for GSM-R（GSM-rail） standard fiber optic repeater is designed.The automatic power control（APC） technique is used to achieve stable laser power output.The redundancy design technique is adopted in receiver part to meet the high reliability requirements of GSM-R standard.The measurement results show that the reflection loss of light is less than-45 dB.The time delay of receiver is less than 60 ns.The rejection ratio out of band and the fluctuation inside the band are up to 30 dB and less than 0.5 dB,respectively.The input and output VSWR（voltage standing wave ratio） are less than 1.3.The dynamic range of RF output is more than 25 dB with the adjusting accuracy of 1 dB.The noise floor is 132 dBm/Hz and the third-order inter-modulation is below-60 dBc.In addition,the module provides a good function of alarming and fault detection.The measurement results show that the module exhibits outstanding RF and optical performances.The module was verified in a GSM-R repeater and the test results prove that it can fully meet the design requirements of the railway.

关 键 词：GSM-R 光纤直放站 射频光收发模块 激光驱动器 FSK通信 

分 类 号：TN929.11[电子电信—通信与信息系统]