摘要
本文针对目标噪声中可能含有对称分布信号的情况,结合三阶统计量具有抑制对称分布信号的特点,提出了用四阶统计量对水下目标噪声进行检测,构造了基于四阶累积量对角切片的检测统计量,并运用该方法对模拟舰船目标信号和潜艇模型信号进行分析,并与双谱方法的检测结果进行了比较。结果表明:基于四阶累积量的检测方法优于双谱检测方法,且具有更小的计算量。
As the target noise may conclude signals with symmetry distribution to which the third order statistics is blind, a fourth order statistics method is proposed to detect the underwater target noise in this paper. A detection statistics based on the diagonal slice of fourth order cumulants is constructed and is applied to the simulated signal, submarine model＇s signal and the real sea trial data. The performance is compared to that of the bispectrtun method. The result indicates that the detection method based on fourth order cumulants is better than that based on bispectrum with a less computation.
出处
《科技广场》
2016年第10期107-109,共3页
Science Mosaic
关键词
信号检测
四阶累积量
对角切片
双谱
Signal Detection
Fourth-order Cumulants
Diagonal Slice
Bispectrum
