Marcelo S. Alencar - Communication Systems

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This book is the result of several years of teaching and research at the Federal University of Campina Grande, Federal University of Pernambuco, and Federal University of Bahia, Brazil. It is intended to serve as a textbook for courses dealing with Communication Systems, Cellular Mobile Systems, or Modulation Theory. The modulation theory is dealt with using stochastic processes, which remains a novel approach for undergraduate texts. The book is suitable for the undergraduate as well as the initial graduate levels of Electrical Engineering courses.

Chapter introduces the concepts of probability, random variables, and stochastic processes and their applications to the analysis of linear systems.

Speech coding is dealt with in Chap. presents amplitude modulation with random signals, including digital signals and performance evaluation methods.

Quadrature amplitude modulation using random signals, including SSB, QUAM, QAM, and QPSK, is the subject of Chap. explains angle modulation with random modulating signals, including frequency and phase modulation, FSK, and PSK.

Channel modeling is the subject of Chap. deals with transmission and reception of the modulated carrier and presents several features of the transmitting and receiving equipment.

Chapter .

The book has five appendices. Appendix A covers Fourier series and transforms, Hilbert transform, and their properties. Appendix B presents formulas used in the text. Appendix C shows tables of the radio-frequency spectrum. Appendix D presents the CDMA cellular system. Appendix E presents the GSM cellular system. An important feature is the many examples and problems to be found throughout the book.

The authors are grateful to Prof. Elvino S. Sousa, University of Toronto, Canada; Prof. Paddy Farrell, Prof. Bahram Honary, and Prof. Garik Markarian, Lancaster University, UK; and Prof. Michael Darnell, York University, UK, for technical communications and useful discussions related to communication systems.

The authors are also grateful to all the members of the Communications Research Groups, certified by the National Council for Scientific and Technological Development (CNPq), at the Federal University of Bahia, at the Federal University of Campina Grande and at the Federal University of Pernambuco, for their collaboration in many ways, helpful discussions and friendship, as well as our colleagues at the Institute of Advanced Studies in Communications.

The authors wish also to acknowledge the contribution of Francisco Madeiro, from the State University of Pernambuco, and Waslon T. A. Lopes, from the Federal University of Paraiba, who wrote the chapter on speech coding, and the support of Thiago T. Alencar, who helped with translation of parts of the text.

The authors are indebted to their families for their patience and support during the course of the preparation of this book.

Finally, the authors are thankful to Mary E. James, Zoe Kennedy, Alex Greene, and Melissa Guasch, from Springer, who strongly supported this project from the beginning and helped with the reviewing process.