针对阵列接收信号中可能同时包含有圆信号和非圆信号,因而很难直接分别估计两类信号源个数的情况,提出了一种基于阵列扩展协方差矩阵特征值分解的解决方法。该方法通过分析观测数据扩展协方差矩阵的结构,特别是其特征值的分布规律,直接得到了复杂信号环境中圆信号和非圆信号个数的估计结果。通过仿真实验验证了各种阵列参数变化时新方法的可靠性。
The problem of source enumeration for simultaneous circular and non-circular signals is consid ered. A novel method is proposed to enumerate the two types of signals by analyzing the structure of the extended covariance matrix, especially the distribution of the eigenvalues, of the array output. Sufficient numerical examples are carried out to verify the robustness of the new algorithm to relative array parameters.