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水声瞬态信号检测方法的性能分析模型研究

DOI: 10.11990/jheu.201409025

Keywords: 瞬态信号检测, 概率分布律, 累积和检验, 性能分析模型

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Abstract:

累积和检验方法根据瞬态信号出现与消失时概率密度分布(PDF)的变化进行有效检测.在纽曼皮尔逊准则下,检测性能分析方法是实现检测的关键.基于马尔可夫状态转移思想,完善了快速傅里叶变换性能分析方法.在高斯分布方差变化假设下,推导了被检测序列量化值域确定方法、更新量概率分布律的计算方法和检测概率的递归计算方法.研究表明,基于上述方法的检测概率理论计算结果和蒙特卡洛仿真实验结果吻合度好,水池和海试数据的分析结果也表明利用该检测性能分析模型计算所得参数,累积和检验方法能有效检测低信噪比的水声瞬态信号.

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