摘要
信源数目确定在许多高分辨阵列信号处理中具有至关重要的作用。提出了一种基于阵列输出4阶累积量信息的信源数目估计方法。通过构造阵列输出的4阶累积量矩阵,根据4阶累积量矩阵特征值分布并采用最小描述长度(MDL)准则估计信源数目。由于信号高阶累积量具有盲高斯特性,该方法能有效地抑制色噪声干扰,可实现色噪声背景下的信源数目估计。仿真分析验证了该方法的有效性。
The estimation of the source number is very important for the high resolution array signal processing. A method of the source number estimation is proposed based on the fourth order cumulant information. By constructing the fourth order cumulant matrix of array output, the number of sources is estimated according to the eigenvalue of the fourth order cumulant matrix and the minimum description length （MDL） criterion. Owing to the blind Gaussian characteristic of the high order cumulant of the signal, the presented method can effectively suppress colored noise interference to realize the estimation of the source number in colored noise background. Simulation result verifies the validity of the new method.
出处
《鱼雷技术》
2009年第1期22-25,共4页
Torpedo Technology
关键词
信源数目估计
高阶累积量
色噪声
最小描述长度(MDL)准则
source number estimation
high order cumulant
colored noise
minimum description length （MDL） criterion.
