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六、自适应谱估计前几章讨论了批处理方法。这种处理假定随机过程是平稳的。尽管协方差法的自相关矩阵不具有平稳过程的特性,即它不是托普里兹矩阵,但模型参数在处理期间仍被看作是常量,这暗示着在处理期间的过程具有时不变谱。对适于包络调制的修正方法,也会遇到同样的问题。实际信号经常是非平稳的。人们给非平稳过程规定了几种谱的定义。一个易于理解的共同
Sixth, adaptive spectrum estimation The first few chapters discussed the batch method. This process assumes that the stochastic process is stationary. Although the autocorrelation matrix of the covariance method does not have the property of a stationary process, ie it is not a Toeplitz matrix, the model parameters are still treated as constants during processing, implying that the process during processing has a time invariant spectrum . The same problem applies to the correction methods suitable for envelope modulation. The actual signal is often non-stationary. Several definitions of non-stationary processes have been defined. A common understanding