Author(s): Duan Shunxing
Pages: 48-50
Year: 2006 Issue:  4
Journal: RAILWAY SIGNALLING & COMMUNICATION ENGINEERING
Keyword:  3G; 覆盖; 干放; 光纤放大;
Abstract: 由于3G信号频率高,在地铁中的泄漏电缆损耗和空间损耗将大大增加,为了达到覆盖要求,必然要引入中继放大.本文介绍应用干放和光纤放大的设计方法.