Signal processing fundamentals and applications for communications and sensing systems / Основы обработки сигналов и её применение в системах связи и зондирования

This book is a revision of my earlier book Signals, Noise, and Active Sensors. As indicated in the title, the present version is directed toward the fundamental operations that are carried out in general, for any application, in the processing of radio-frequency, optical, and acoustic signals, rather than toward any specific applications themselves. The material is based on notes for a course on this subject that I taught at the Polytechnic University of New York. None of the earlier material dealing specifically with radar, sonar, and laser radar, however, has been omitted.

The technical activity that has come to be known as signal processing, in fact, originated during World War II with the development of radar and continues to be influenced by sensing systems applications. Since in radar one deals with pulsed signals, the early efforts that led to the development of the new mathematical concepts, analytical schemes, and computational techniques— necessitated by the problem of detection and extraction of information from the inevitably weak radar echoes in the presence of random interference— provide much of the theoretical basis for the digital age. Now, of course, there are many diverse applications requiring the processing of signals, one of the most important of which is communications. Also, in addition to radiofrequency systems, optical and acoustic systems have become equally important with the development of optical communications, and numerous medical applications, including ultrasonics, as well as sonar. Physical differences in these three types of signal waves give rise to different problems in the processing of these signals, which are dealt with here, as they were in the earlier version. <...>