m系列广泛应用于系统脉冲响应函数的辨识。本文证明:选取适当的正负幅度比值,可以使得系列的自相关函数在非零整数点上等于零。将这种系列应用于多输入多输出系统的脉冲响应阵以及ARMA模型的参数辨识,其效果要比原有m系列好得多,论文最后指出:IMS就是功率限制下,MA模型的一种D—最优输入信号。 m series is widely used in the identification of the system impulse response function. This paper proves that the autocorrelation function of the series can be equal to zero at non-zero integer points by choosing the appropriate ratio of positive and negative amplitude. The application of this kind of series to the impulse response matrix of multi-input multi-output system and the parameter identification of ARMA model is much better than the original m series. Finally, the paper points out that IMS is a kind of D - Optimal input signal.