This structure, formed for diverse nets of communication, demands Mathematical Modeling, Specification, Regulation and many other pursuings of the Area of Electric-Electronics Engineering and the Engineering of Telecommunications. The Analysis of Fourier became it indispensable tool in the treatment of many obscure points of the Modern Physics, of the Theory of the Communication, Linear Systems, and many other branches of Science. Thus being, the central objective of the present work is to the same study some applications of the Transformed one of Fourier into the Principles of Communication, being distinguished in the main body of the Analysis of Signals, some Ideal Forms of Modulation, Transmission without Distortion and Filters. INTRODUCTION As already was observed and salient in the Summary, the Analysis of Fourier became it mainly indispensable tool in almost all the branches of Accurate Sciences and in the diverse areas of Engineering. Our concern in the choice of the subject was to congregate some subjects well current and to use the Transformed one of Fourier as basic tool to attack them. Also, we summarize the importance of famous ‘ ‘ funo’ ‘ delta of Dirac in the Appendix. We detach in a global vision the Random theory on Linear Systems and Processes.
On the other hand, considering that the Theory on Principles of Communication is one it disciplines basic and essential in the formation of the current engineer, we look for to contribute and to help to supply a necessity of the market of books in Portuguese Language, clear form and with all the pertinent demonstrations, having conscience that the subject is vastssimo. Remembering, despite, with the fast result of the technological progress, the diverse areas of lesser Engineering are converging and are each time the differences between them; the collection of data, transport, storage and processing of information made with that Disciplina Principles of Communication if became a necessity in the Courses of Engineering. The market of work in Telecommunications has promoted seminaries and courses for the good formation of hand of specialized workmanship and research directed toward this area. We must emphasize, still, that some Courses Technician have an introduction to this discipline. In this in case that, it competes to the professor making of this Monograph a plastic and alive organism; it competes to it choosing, as the direction of the Course, what it can make and what can leave according to make, what can put in front or postpone, peculiar conditions of its pupils.