采用复合码与和码辨识Hammerstein模型及前馈非线性系统
Identification of the Hammerstein Model and the Feedforward Nonlinear System Using Complex Codes and Sum Codes
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摘要: 本文提出了一种利用复合码与和码辨识H模型和前馈非线性系统的方法,其随机码是由 相位相差l/2半周期的逆重复m序列所组成.此方法即使非线性元件的奇次系数全为零,仍 能辨识出线性系统的脉冲响应和非线性元件的偶次系数.文中附有辨识H模型的数字仿真结 果.Abstract: An approach is proposed in this paper to identify the H model and the feedforward nonlinear system using complex codes and sum codes. The codes are formed by the inverse repeat PRBS which are out of phase by 1/2 half-period each other. The impulse response of the linear system and the even coefficients of the nonlinear elements can be also identified by means of proposed approach, even if all odd coefficients of the nonlinear elements are equal to zero. The validity of proposed algorithm has been proved by the results of digital simulation to identify Hammerstein model.
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