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近年来,谱估计研究十分活跃,应用日益广泛。如何提高谱估计的精度及分辨率是一个引人注目的研究课题。这当中,既有理论问题也有实践问题。本文主要阐述最大熵(MEM)谱估计的基本原理及算法;指出MEM谱估计的特点及应用注意事项。最后简要介绍MEM谱估计向多变量(多通道)、多维谱估计的延拓与发展。
In recent years, spectral estimation research is very active, and its application is increasingly widespread. How to improve the accuracy and resolution of spectral estimation is an attractive research topic. Among these, there are both theoretical and practical issues. This paper mainly expounds the basic principle and algorithm of maximum entropy (MEM) spectral estimation; points out the characteristics of MEM spectrum estimation and application precautions. Finally, a brief introduction to the extension and development of the estimation of multivariate (multi-channel) and multidimensional spectra from MEM profiling is given.