A collection of tutorials on modulation related topics, such as:

• AM, FM modulation
• Spread spectrum
• OFDM

Java applets are utilized in the tutorials to allow you to experiment with the concepts

This website features a comprehensive glossary of RF and Microwave terms along with many "rules of thumb" practical articles. It is now affiliated with the IEEE Microwave Theory and Techniques society.

This site is full of well-written tutorials on wireless communications and DSP topics.

In this 5th Edition, the author continues to evaluate various novel techniques and design methods for the modulation and transmission of digital data, allowing the readers to gain a firm understanding of the processes needed to effectively design wireless data link communication systems. Since the author regularly runs industry seminars based on this book, he is continuously updating the book material. This edition includes thorough updates of all chapters including all concepts and revised and new figures.

Master every key digital communications technology, concept, and technique.

Digital Communications, Second Edition is a thoroughly revised and updated edition of the field's classic, best-selling introduction. With remarkable clarity, Dr. Bernard Sklar introduces every digital communication technology at the heart of today's wireless and Internet revolutions, providing a unified structure and context for understanding them -- all without sacrificing mathematical precision.