论文部分内容阅读
文中研究了在低轨卫星星座中,星上处理器利用地面移动用户终端上行信号固有的多普勒频移信息预测切换时间的算法,该算法无需用户终端额外辅助。针对DDBHP算法预测误差大、成功率低等问题,提出了二维切换预测(2-DDUHP)算法,分析了解其唯一性,并给出了低复杂度的求解过程。研究表明:该预测算法能在各种仰角和测量条件下稳定工作,并能容忍较大的多普勒测量误差,有较强的实用价值。
This paper studies the algorithm of on-board processor using Doppler shift information inherent in up-land mobile user terminal signal in LEO satellite constellation, which does not require extra assistance of user terminal. In order to solve the problem of large prediction error and low success rate of DDBHP algorithm, a two-dimensional handover prediction (2-DDUHP) algorithm is proposed and its uniqueness is analyzed and analyzed. The solving process with low complexity is also given. The research shows that this prediction algorithm can work stably under various elevation angles and measuring conditions, and can tolerate large Doppler measurement errors, which has strong practical value.