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2005, 10, 6-7+29
LEO卫星信道多普勒频移估计与补偿
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为削弱LEO卫星信道的时间选择性衰落,提出了一种多普勒频移估计与补偿方法。基于差分相关检测器,从中频信号提取下行信号中的多普勒频移信息,然后利用A/D和DSP进行相应地采集与处理。用得到的多普勒频移估计实时调节接收机本振频率,实现对下行信号的多普勒频移补偿,同时计算出上行多普勒频移并进行补偿。该方法无需符号同步,特别适合于超过符号速率的多普勒频移估计。

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参考文献

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中图分类号:TN927.2

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[1]韩力,蔚保国,郭石小羽,罗伟雄.LEO卫星信道多普勒频移估计与补偿[J].无线电工程,2005(10):6-7+29.

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