Hilbert Space Methods in Signal Processing [Hardcover]

An accessible introduction to Hilbert spaces, combining the theory with applications of Hilbert methods in signal processing.This lively and accessible book describes the theory and applications of Hilbert spaces and also presents the history of the subject, in order to reveal the ideas behind theorems and the human struggle that led to them. Specific applications in signal processing are presented in detail.This lively and accessible book describes the theory and applications of Hilbert spaces and also presents the history of the subject, in order to reveal the ideas behind theorems and the human struggle that led to them. Specific applications in signal processing are presented in detail.This lively and accessible book describes the theory and applications of Hilbert spaces and also presents the history of the subject to reveal the ideas behind theorems and the human struggle that led to them. The authors begin by establishing the concept of 'countably infinite', which is central to the proper understanding of separable Hilbert spaces. Fundamental ideas such as convergence, completeness and dense sets are first demonstrated through simple familiar examples and then formalised. Having addressed fundamental topics in Hilbert spaces, the authors then go on to cover the theory of bounded, compact and integral operators at an advanced but accessible level. Finally, the theory is put into action, considering signal processing on the unit sphere, as well as reproducing kernel Hilbert spaces. The text is interspersed with historical comments about central figures in the development of the theory, which helps bring the subject to life.Part I. Hilbert spaces: 1. Introduction; 2. Spaces; Part II. Operators: 3. Introduction to operators; 4. Bounded operators; 5. Compact operators; 6. Integral operators; Part III. Applications: 7. Signals and systems analysis on the 2-sphere; 8. Signal concentration and joint spatio-spectral analysis; 9. Convolution on 2-sphere; 10. ReproducinlC