非最小相位SIMO系统的盲辨识方法  

A Blind Identification Method for Nonminimum Phase SIMO Systems

作　　者：胡怀中[1] 刘文江[1] 王勇[1] 李嘉[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《控制与决策》2005年第8期935-938,共4页Control and Decision

基　　金：国家自然科学基金项目(60074030);高等学校博士学科点专项基金项目(20010698001)

摘　　要：提出一种非最小相位SIMO系统的盲辨识方法.SIMO系统的多个输出可重新组合为具有循环平稳特性的输出序列,利用信号子空间与噪声子空间正交的特性,可求解系统的模型参数.该方法能辨识最小相位对象的结构参数,对非最小相位对象以及具有无限冲击响应的对象同样有效.该方法运算复杂度低,辨识速度快.仿真结果验证了其有效性.A new blind identification method for nonminimum phase SIMO systems is proposed. The outputs of each channel are re-organized as a new output sequence, which has cyclostaionarity property. Based on subspace decompositions the parameters of different channels are estimated separately. Compared with conventional approaches, this method is not only suitable for the identification of minimum phase systems but also effective to nonminimum or IIR systems. The method has less computation complex and high estimation speed. The simulation result illustrates the efficiency.

关 键 词：非最小相位 单输入多输出 盲辨识 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]