摘要
通过分析国内普速干线450 MHz无线列调通信系统的现状,以及国家对450 M~470 MHz频段的相关政策要求,讨论了450 MHz无线列调通信系统改造为铁路数字移动通信系统(GSMR)的必要性。针对基站+模拟直放站、基站+数字直放站、分布式基站BBU+RRU的改造方案,从噪声干扰、多径时延、设备兼容性、工程投资等方面进行比较,分析了3种方案的优缺点,并提出改造建议,对既有铁路450 MHz无线列调通信系统改造具有参考意义。
Based on the analysis of the current situation of 450 MHz wireless train dispatching communication system for general speed trunk lines in China and the relevant national policy requirements for 450 M~470 MHz frequency band,this paper discusses the necessity of transforming 450 MHz wireless train dispatching communication system into railway digital mobile communication system(GSM-R).Aiming at the three transformation schemes of base station+analog repeater,base station+digital repeater and distributed base station BBU+RRU,this paper compares the advantages and disadvantages of the three schemes from the aspects of noise interference,multipath delay,equipment compatibility,and engineering investment,then puts forward transformation suggestions,which have reference significance for the transformation of the existing railway 450 MHz wireless train modulation communication system.
出处
《铁道通信信号》
2023年第2期45-49,共5页
Railway Signalling & Communication
