西延线扩能改造工程无线列调通信设计

比较5种弱场覆盖方案的优缺点，提出在西延线全线采用光直放站＋无线直放站＋天线，隧道内采用直放站＋螺旋天线的设计方案，取消了隧道内漏泄电缆的设置，并利用既有长途通信电缆为直放站远程供电，使全线无线列调场强覆盖满足了行车调度的需要，又减少了对既有线通信设施的损坏，有效节约了投资，可为类似工程提供借鉴。

Communication Design of Train Dispatch Radio for Capacity enlarging Renovation Project of Xi'an-Yan'an Line

Through comparing the advantages and disadvantages of 5 weak field covering schemes, a design solution, which adopted optical repeater, wireless repeater, plus antenna mode on the whole line of Xi＇yan railway and repeater plus spiral antenna mode inside the tunnels, was proposed. The solution canceled the installation of leakage cable inside the tunnels and made use of existing trunk cable to provide remote power supply for the repeaters. The solution satisfies the requirement of wireless train dispatching field covering, and decreases the damage on the existing communication facilities as well. Furthermore, it reduced the investment of project and offered reference for other similar projects.