根據地鐵線路的特點，給出了地鐵無線調度通信系統的組成，并對基于摩托羅拉的TETRA(陸地集群無線電) 系統應用做出了具體設計，包括系統結構設計、隧道場強覆蓋方式的設計、射頻信號放大方式的設計。重點介紹了基于IP的TETRA(DIMETRA IP)系統應用的設計，結合實際給出了可靠性設計的具體方案。為了更好的適應地鐵通信系統發展，實現對DIMETRA IP系統的二次開發，本文著重介紹CAD服務器的二次開發，使其真正滿足地鐵用戶的需求。

　　Abstract:

　　According to the characteristics of subway lines， this article introduced the composition of subway wireless dispatching communication system， and the design based on TETRA system was provided，which included system architecture design， tunnel field coverage design， as well as the design of RF signal amplification. This article mainly introduced the design of DIMETRA IP system application. In order to better adapt to the subway communication system development， DIMETRA IP system realized to the secondary development. This paper mainly introduced the second development of CAD server， and make it truly satisfy subway needs of users.