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电子学报  2013 

大动态多普勒频率下微弱直扩信号的长时间积累算法

DOI: 10.3969/j.issn.0372-2112.2013.12.012, PP. 2397-2402

Keywords: 大动态多普勒频率,微弱直扩信号,长时间积累,运动补偿

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Abstract:

大动态多普勒频率情况下,微弱直扩信号的长时间积累存在积累损失和计算量急剧增加的问题.对此,本文提出一种基于运动补偿的二倍分组块补零算法,在二倍分组块补零算法的基础上,通过谱循环移位搜索多普勒频率,采用包络平移和Keystone变换补偿码多普勒频率.理论分析和仿真结果表明,新算法能有效消除大动态多普勒频率对长时间累积的影响,同时计算效率高,相干积累20ms时的计算量仅为同类算法的16%,且时间越长、优势越大.

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