对角切片高阶累积量干扰检测技术研究

Research on Interference Detection Technology Based on Diagonal Slice High-order Cumulant

在缺乏先验知识全球导航卫星系统(GNSS)干扰检测中,针对强噪声背景下的弱信号检测问题,利用高斯噪声高阶累积量为零的特性,提出一种递推的基于三阶对角切片的高阶累积量检测方法,算法具有检测性能好、计算量相对较少的特点。仿真结果表明,在高斯白噪声条件下,算法不但对各类型的干扰均具有较好的检测性能,且性能优于时频域能量检测算法。在缺乏先验条件的卫星导航系统干扰检测领域具有良好的应用前景。

For weak signal detection problem in strong noise background in GNSS interference detection with little priori knowledge,this paper proposes a recursive high-order cumulant detection method based on diagonal slice,according to the fact that the high-order cumulant of Gaussian noise is zero. This method has good detection performance, and relatively less computation amount. Simulation results show that under the condition of Gaussian white noise,the algorithm not only has better detection performance for various types of interference, also has better performance than the frequency domain energy detection algorithm. This method has a good prospect in the interference detection field of satellite navigation systems with little priori knowledge.