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电子学报  2014 

基于时间序列分析的频谱异常自主检测和稳健估计方法

DOI: 10.3969/j.issn.0372-2112.2014.06.003, PP. 1055-1060

Keywords: 频谱异常,自主检测,稳健估计,电磁环境

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Abstract:

复杂电磁环境和无用频先验知识条件下有效检测电磁频谱异常使用信息,是无线电监测和电磁环境评估等领域的重要难题.本文基于时间序列分析理论,通过构建反映有限频谱占用度序列动态依存关系且包含频谱异常值的时序模型,实现对无线电频谱异常的自主检测和稳健估计.研究结果表明,该方法无需用频数据库或无线电监测历史数据支持,能够有效识别典型频谱异常类型、发生时间以及异常影响强度等信息;同时通过对频谱占用度时序模型的稳健估计,能够显著降低模型拟合误差,提高模型对外部干扰环境的适应性和鲁棒性.

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