低轨卫星多普勒频移特性几何估计算法  

A Geometric Algorithm of Doppler-Time Characterization for LEO Satellite

作　　者：王爱华[1] 王星原[1] 陈丽婷[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2016年第12期1294-1297,共4页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2012AA01A505);国家自然科学基金资助项目(61271258)

摘　　要：为了能实时准确地计算低轨卫星的多普勒频移,提出了一种适用于不同偏心率的低轨道卫星多普勒频移几何计算方法.该方法无需地面终端经纬度位置及卫星实时坐标,仅由卫星轨道参数及终端处最大可视仰角即可得到当前可见窗内多普勒频移特性.算法计算过程简单、复杂度低、利于片上编程,仿真结果及数值分析均表明该算法具有较高的精确度,可为卫星通信接收机多普勒频移估计与补偿提供先验信息.To estimate Doppler frequency shift （DFS） accurately and rapidly, a geometric algorithm of LEO Doppler-time was provided to adapt to different eccentricity. Based on the orbital parameters and the maximum visual elevation angle, the algorithm can get the Doppler- time characterization during the satellite＇s visibility window; which is irrelative to the terminal location and the satellite coordinate. Simulation results and numerical analysis indicate that the algorithm has higher precision, lower complexity and is easy for programming on-chip. And it can provide prior information for satellite communication receiver to estimate and compensate the Doppler frequency shift.

关 键 词：低轨卫星 多普勒频移时变特性 不同轨道偏心率 

分 类 号：TN927.2[电子电信—通信与信息系统]