中文说明：在阵列信号处理中，有时需要估计信号源个数，常用的两种比较经典的方法，AIC和MDL，这里给出其MATLAB代码的仿真结果，两种方法都是常用的方法。
English Description：
In array signal processing, it is sometimes necessary to estimate the number of signal sources. There are two classical methods commonly used, AIC and MDL. The simulation results of matlab code are given here. Both methods are commonly used.