《高阶谱分析》例题5.4，根据零极点分布建立传递函数，求解冲击响应和系统输出，求解高阶矩或累计量，计算倒谱参数。- Higher-order spectral analysis, Example 5.4, according to the distribution of zeros and poles of transfer function to establish, to solve the impact of response and system output, for solving