远距离定向覆盖技术在应急通信中的应用浅谈  

Discussion on Application of Long-Distance Directional Coverage Technology in Emergency Communication

作　　者：张琳 

机构地区：[1]福建机动通信局,福建福州350002

出　　处：《移动通信》2016年第14期29-33,共5页Mobile Communications

摘　　要：为了在发生火灾、爆炸、化工泄漏等安全事故时,应急通信队伍为现场救援提供及时通信的同时,确保现场执行应急通信任务人员的人身安全,应急通信人员需要与事故现场保持一定距离。通过对特殊灾害场景安全距离需求与现有车载应急通信系统技术性能进行对比,从理论上分析了实现远距离定向覆盖的方法和可行性,并制定对策,进行了实地模拟实验。通过实验,验证了通过替换天馈系统、改造基站射频单元、调整无线参数及提高信号强度和天线增益等方式提升远距离覆盖的效果,实现了在特殊场景下对车载CDMA系统的覆盖需求。In the event of a fire, explosion, chemical leakage and other safety accidents, the emergency communication crew need to provide timely communication for on-site rescue, and to ensure personal safety of field technicians at the same time, the crew are required to do so from a distance. This article compared the demand of safety distance in special disaster scenes with the technical performance of existing vehicle-borne emergency communication system, and analyzed the methods and feasibility of realizing effective coverage over a distance in theory. Countermeasures were made, and field simulation experiments were conducted. It was verified by field tests that the effective coverage over a distance can be improved through several methods, such as replacing the antenna feeding system, reforming the base station radio frequency unit, adjusting wireless parameters, increasing signal strength and antenna gain, etc. Thus long distance coverage of vehicle-borne CDMA communieation systems in special situations has been achieved.

关 键 词：CDMA通信 应急通信 远距离定向覆盖 

分 类 号：TN929.53[电子电信—通信与信息系统]