In real electronic systems, voltage and current signals are not necessarily of a periodical quantity, due to the presence of nonharmonic components or/and possible stochastic variation. This book presents in three parts methods for analyzing and processing and reconstructing complex signals.

The first part of this book is dedicated to the problem of measurements of the basic electric quantities in electric utilities, both from the aspect of accuracy of this type of measurements and the possibilities of simple and practical realization. The second part presents a reconstruction of trigonometric polynomials, a specific class of band-limited signals, from a number of integrated values of input signals. The third part deals with the problem of estimating the value of the active power of the ac signal in the presence of subharmonics and interharmonics. The analysis makes use of the most general model of the voltage and current signal, i.e. the most complex spectral content that can be expected to appear in practice.

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In real electronic systems, voltage and current signals are not necessarily of a periodical quantity, due to the presence of nonharmonic components or/and possible stochastic variation. This book presents in four chapters methods for analyzing and processing and reconstructing complex signals.

The processing of nonharmonic components of ac signals, i.e. interharmonics and subharmonics based on the principles of synchronous sampling is a topic of chapter two. The conditions, required for the performance of such a processing, have necessarily been derived.

The problem of the reconstruction of complex periodic signals, which is in the focus of chapter three of this monograph, has been given special attention. A completely new protocol, which enables the development of much superior and more efficacious algorithms, has been developed, and the obtained results are unique in global practice.

A newly developed method for the calculation of basic parameters of the processed voltage and current signals is given in chapter four. Having being practically verified, this method has demonstrated exceptionally favorable performance.

The monograph is beneficial to specialists and experts involved in problems of this scientific field, and it will serve as a useful guideline to follow in further investigations.

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