This book has been written to serve as a guide for students of higher education institutions.

The first part includes Fourier series. It examines the Fourier series of a periodic function and its various forms. The second part explores Fourier transforms and their different forms as well as the Fourier integral.

Particular emphasis is placed on the properties of the Fourier transform, where the reader gains the ability to handle these properties through numerous examples.

Aside from its mathematical significance, the material in this book provides a necessary background for studying telecommunications and signal transmission problems. Therefore, this book serves as an introduction to telecommunications and signal transmission.

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