张兆辉,张太华

• 1:贵州师范大学

摘要(Abstract)：

对于近地轨道飞行器与卫星之间的通信链路,信号收发两端之间的相对运动导致载波存在高动态的多普勒频偏。另外,信号的远距离传输使得信号很微弱,这就极大地降低了信噪比。为了解决低信噪比和高动态环境下的多普勒频偏估计问题,提出一种多累积周期估计方法,提高多普勒频偏检测概率。该方法利用多个信号累积周期来缩小下一个累积周期内谱峰检测的频率区间,进而提高多普勒估计性能。理论分析和仿真结果表明,与现有方法相比,提出的多累积周期估计方法不仅可以提高检测概率而且可以减小估计误差。

关键词(KeyWords)： 近地轨道飞行器;多普勒频偏;低信噪比;累积周期;检测概率;估计误差

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(71161006)~~

作者(Author): 张兆辉,张太华

DOI: 10.16652/j.issn.1004-373x.2018.03.009

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