基于HPOP的低轨星座多普勒与时延研究  

HPOP-based Doppler Frequency-Shift and Time-Delay of Polar Orbit Constellation Satellite

作　　者：李飞龙[1] 卢超[2] 李薇[3] 杨杰[2] 

机构地区：[1]解放军理工大学通信工程学院研究生4队 [2]解放军理工大学通信工程学院研究生3队 [3]中国人民解放军第61068部队

出　　处：《通信技术》2016年第1期18-23,共6页Communications Technology

基　　金：国家自然科学基金项目(No.91338201)~~

摘　　要：针对低轨星座卫星受力模型复杂和不精确带来的卫星信号多普勒频移和传播时延难以估算的问题,结合低轨星座方案技术参数和空间结构,提出利用高精度轨道预报HPOP模型作为卫星受摄运动模型,对高动态特性的卫星进行星历预报,得到精确的卫星星历后利用星历中的轨道参数以及地面接收机的经度、纬度和高程,采用几何矢量法,建立星座卫星的多普勒频移和时延估计模型,通过STK与MATLAB联合仿真得出卫星的多普勒与时延值,为星座卫星在通信、定位等业务中的应用提供多普勒与时延补偿的先验信息,对信号的快速捕获、精密跟踪及星地网时间同步设置具有一定的参考价值。Aiming at the difficult estimation of doppler frequency-shift and time-delay resulted from the complex and imprecise force model of low orbit constellation satellites signal, HPOP （ High Precision Orbit Prediction） model is proposed in combination of technical parameters with spatial structure of low orbit constellation satellites, which is taken as the satellite perturbed motion model. Thus, ephemeris prediction on the satellite with high-dynamic characteristics could be done, and based on accurate satellite ephemeris orbital parameters and the latitude, longitude and elevation of ground receiver. The estimation model of Doppler frequency-shift and time-delay be established with the geometric vector method. Co-simulaition of between STK and Matlab shows Doppler frequency-shift and time-delay values, and this could provide priori information of Doppler and delay compensation for satellite communications and positioning services, and serve as an important reference value for fast signal capture, precise tracking and satellite ground net- work time synchronization.

关 键 词：星座卫星 卫星星历 HPOP 多普勒频移 时延 

分 类 号：TN927[电子电信—通信与信息系统]