This book deals with these parametric methods, first discussing those based on time series models, Capon's method and its variants, and then estimators based on the notions of sub-spaces. However, the book also deals with the traditional „analog“ methods, now called non-parametric methods, which are still the most widely used in practical spectral analysis.
Spectral Analysis | Parametric and Non-Parametric Digital Methods | ISBN 9781118614273