对于一个给定的离散随机序列，用间接法进行三阶累积量谱的估计，并分别用四种不同窗函数，包括Hamming窗、Sasaki窗、Parzen窗、daniell窗等。-For a given discrete random sequence, using the indirect method for third-order cumulant spectrum estimation, and were four different window functions, including the Hamming window, Sasaki window, Parzen window, daniell windows.