摘要
针对空中机动平台与地面站宽带通信中的目标捕获问题,提出了地面天线目标捕获概率和捕获时间的计算方法。在数学建模的基础上,分析了不同天线扫描方式、扫描速度、飞机飞行状态的参数选择对捕获概率和捕获时间的影响,推导了其捕获概率的计算公式。仿真结果表明:初始捕获阶段,光栅扫描的捕获概率和捕获时间都明显优于螺线扫描;而在失锁重捕阶段,螺线扫描的捕获概率更高,且不受扫描速度的影响。该仿真结果已在工程设计中应用。
For target acquisition in broadband communication between mobile platform and ground station,a calculation method for target acquisition probability and acquisition time by ground antenna is proposed.By mathematical modeling,influence of parameter selection of antenna scanning style,scanning speed andaircraft flight status on acquisition probability and acquisition time is analyzed,and the computation formulaof acquisition probability is derived. Simulation results show that,at initial acquisition stage,the acquisitionprobability and acquisition time by raster scan exceed those by helical scan,and at losing lock reacquisitionstage,the acquisition probability by helical scan is higher and independent of scanning speed. These simulation results have been applied in engineering design.
出处
《电讯技术》
北大核心
2016年第4期448-452,共5页
Telecommunication Engineering
关键词
宽带通信
地面天线
目标捕获
光栅扫描
螺旋线扫描
捕获概率
捕获时间
broadband communication
ground antenna
target acquisition
raster scan
helical scan
acquisition probability
acquisition time
