摘要
针对深空航天器在某些运行阶段轨道预报精度不够的情况,利用航天器下行差分单向测距(DOR)侧音信号的特点,论述了用于时延模型重建的条纹搜索算法的原理,并对算法流程进行了详细说明和仿真。结果表明,该算法能够精确提取两测站间的时延差和多普勒频差,为时延和时延率模型的精确重构创造了必要条件,从而可以正确引导相关器数据处理,实现对深空航天器的精确导航。
A fringe search algorithm based on differential one-way ranging（DOR）tone signal is presented to solve low accuracy of delay model caused by phase modulation orbit transformation of spacecraft,and its process is analyzed in theory and simulated.The simulation results show that the fringe search algorithm can extract differential delay and differential Doppler with high accuracy for reconstruction of delay model and delay rate model,which is a necessary condition for data correlation processing and spacecraft navigation.
出处
《无线电工程》
2011年第11期10-12,30,共4页
Radio Engineering
关键词
DOR侧音
条纹搜索算法
互谱
群时延
DOR tone
fringe search algorithm
cross spectrum
group delay
