最大似然（ML）准则和最大后验概率（MAP）准则，滤波求和方式实现宽带波束形成，分析了该信号的时域、频域、倒谱，循环谱等。( Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Filtering summation way broadband beamforming, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc.)