A standard radio navigational beacon installed at the southwest end of the runway promontory to provide track guidance to aircraft departing from the runway . integrated centralised monitoring system ( icms ) 这是一台标准的无线电导航信标，装置在跑道的西南端，用以提供航迹指引给起飞的航机使用。
At ancient times , people were navigated by means of sun , fixed stars , etc . , while currently the common navigation systems are astronomic navigation , inertial navigation and radio navigation 以前，人们主要利用太阳、星星等自然天体。现在人们利用的导航系统主要有：天文导航系统、惯性导航系统、无线电导航系统三大类。
Considering characteristics of radio propagating offshore and flexibility of radio area navigation system , when distance is less than 1000km , center frequency of navigation signal should be chosen in 2mhz 综合考虑电波海上传播特性和陆基区域无线电导航系统的机动性,在海上作用距离不超过1000km时,导航信号中心频率采用2mhz频段。
This thesis analyzes the principle and architecture of area navigation system and investigates the problems related with positioning precision , which are modeled and realized with simulation tool , matlab 本论文分析了基于直扩的区域无线电导航系统的总体结构和工作原理,对区域导航中和定位精度有关的部分进行了研究,并利用matlab软件进行建模仿真。
A dvordme standard international civil aviation organisation ( icao ) radio navigational aid that provides bearing and distance information to aircraft and to define air traffic control routes for en - route , terminal and instrument approachdeparture procedures 这是国际民航组织指定的标准无线电导航设备，向航机提供方向及距离的资料，以确定航路、终端区程序、仪表进场及离场程序等。
Doppler very high frequency omni - directional range and distance measuring equipment ( dvordme ) system standard icao radio navigational aids used to provide bearing and distance information to aircraft and to define air traffic control routes for en - route , terminal and instrument approachdeparture procedures 这是国际民航组织指定的标准无线电导航设备，可向航机提供方向及距离的资料，并可以确定航路、终端区程序、仪表进场及离场程序等。
Subsequently , the communication of wireless is introduced as well as the key points of receiver ’ s rf front end . then , the design methods of receiver with high linearity and high dynamic range are recommended too . also , the blue print of the receiver , the achievement of function guide line and the problems in real debugging are discussed in detail 本文先介绍了当代无线电导航的状况以及发展趋势和无线电的传播,然后对接收机射频前端的关键技术指标进行了深入分析,还介绍了系统在大动态范围,高线性实现的一些设计方法,之后详述了本项目采用的方案、具体功能指标的实现以及在设计与实现中应该注意的问题,最后给出系统的测试结果。
