本文证明了对IIR信道输出进行过采样 (采样率是输入码率的整数倍 )可以转化成单输入多输出的多信道模型 ,并且不同的信道有相同的AR系数 .基于这一特性本文提出一种基于子空间分解的信道参数盲辩识方法 ,即不同信道的MA系数可以由输出信号的噪声子空间唯一确定 ,而AR系数则可以通过求解YW方程得到 This paper proves that over sampling the IIR channel output (the sampling rate is an integer multiple of the input bit rate) can be converted into a single input multiple output multi-channel model, and different channels have the same AR coefficient.Based on this feature, The blind identification method of channel parameters based on subspace decomposition is that the MA coefficients of different channels can be uniquely determined by the noise subspace of the output signal and the AR coefficients can be obtained by solving the YW equation